Form N-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q


QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-21213         

        Nuveen Insured Tax-Free Advantage Municipal Fund         
(Exact name of registrant as specified in charter)


        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)


Jessica R. Droeger—Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            10/31          

Date of reporting period:          07/31/05         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

      Portfolio of Investments (Unaudited)              
      Nuveen Insured Tax-Free Advantage Municipal Fund (NEA)              
      July 31, 2005              
 
 
 
  Principal      Optional Call          Market 
  Amount (000)    Description(1)    Provisions*    Ratings**      Value 
      Alabama - 8.3% (5.5% of Total Investments)              
$   5,655    Colbert County-Northwest Health Care Authority, Alabama, Revenue Bonds, Helen Keller Hospital,   6/13 at 101.00    Baa3    $   5,862,595 
      Series 2003, 5.750%, 6/01/27              
  3,100    Huntsville Healthcare Authority, Alabama, Revenue Bonds, Series 1998A, 5.400%, 6/01/22 - MBIA   5/12 at 102.00    AAA      3,399,770 
      Insured              
  6,280    Jefferson County, Alabama, Sewer Revenue Capital Improvement Warrants, Series 2002D, 5.000%,   8/12 at 100.00    AAA      6,833,080 
      2/01/32 (Pre-refunded to 8/01/12) - FGIC Insured              
  1,750    Montgomery, Alabama, General Obligation Warrants, Series 2003, 5.000%, 5/01/21 - AMBAC Insured   5/12 at 101.00    AAA      1,866,550 
  4,500    Sheffield, Alabama, Electric Revenue Bonds, Series 2003, 5.500%, 7/01/29 - AMBAC Insured   7/13 at 100.00    Aaa      4,996,710 
      Arizona - 3.8% (2.5% of Total Investments)              
  10,000    Maricopa County Pollution Control Corporation, Arizona, Revenue Bonds, Arizona Public Service   11/12 at 100.00    AAA      10,449,200 
      Company - Palo Verde Project, Series 2002A, 5.050%, 5/01/29 - AMBAC Insured              
      California - 29.0% (19.2% of Total Investments)              
  13,500    California, General Obligation Refunding Bonds, Series 2002, 5.250%, 4/01/30 - XLCA Insured   4/12 at 100.00    AAA      14,377,230 
  7,500    California, General Obligation Bonds, Series 2004, 5.000%, 4/01/31 - AMBAC Insured   4/14 at 100.00    AAA      7,873,500 
  26,300    California State Public Works Board, Lease Revenue Bonds, Department of General Services, Capital   12/12 at 100.00    AAA      27,421,432 
      East End Project, Series 2002A, 5.000%, 12/01/27 - AMBAC Insured (PLG)              
  2,910    Cathedral City Public Financing Authority, California, Tax Allocation Bonds, Housing Set-Aside,   8/12 at 102.00    AAA      3,059,661 
      Series 2002D, 5.000%, 8/01/26 - MBIA Insured              
  2,500    Irvine Public Facilities and Infrastructure Authority, California, Assessment Revenue Bonds, Series   9/05 at 103.00    AAA      2,575,800 
      2003C, 5.000%, 9/02/23 - AMBAC Insured              
  4,000    Montara Sanitation District, California, General Obligation Bonds, Series 2003, 5.000%, 8/01/28 -   8/11 at 101.00    AAA      4,196,200 
      FGIC Insured              
      Plumas County, California, Certificates of Participation, Capital Improvement Program, Series              
      2003A:              
  1,130    5.250%, 6/01/19 - AMBAC Insured   6/13 at 101.00    AAA      1,231,271 
  1,255    5.250%, 6/01/21 - AMBAC Insured   6/13 at 101.00    AAA      1,362,177 
  1,210    Redding Joint Powers Financing Authority, California, Lease Revenue Bonds, Capital Improvement   3/13 at 100.00    AAA      1,262,696 
      Projects, Series 2003A, 5.000%, 3/01/23 - AMBAC Insured              
  3,750    Sacramento Municipal Utility District, California, Electric Revenue Bonds, Series 2003R, 5.000%,   8/13 at 100.00    AAA      3,949,013 
      8/15/28 - MBIA Insured              
  1,500    San Diego Community College District, California, General Obligation Bonds, Series 2003A, 5.000%,   5/13 at 100.00    AAA      1,575,090 
      5/01/28 - FSA Insured              
  3,000    San Jose Redevelopment Agency, California, Tax Allocation Bonds, Merged Area Redevelopment Project,   8/10 at 101.00    AAA      3,101,910 
      Series 2002, 5.000%, 8/01/32 - MBIA Insured              
  1,055    Turlock Irrigation District, California, Certificates of Participation, Series 2003A, 5.000%,   1/13 at 100.00    AAA      1,099,764 
      1/01/28 - MBIA Insured              
  6,300    University of California, Revenue Bonds, Multi-Purpose Projects, Series 2003A, 5.000%, 5/15/33 -   5/13 at 100.00    AAA      6,599,691 
      AMBAC Insured              
      Colorado - 3.8% (2.5% of Total Investments)               
      Bowles Metropolitan District, Colorado, General Obligation Bonds, Series 2003:               
    4,300    5.500%, 12/01/23 - FSA Insured    12/13 at 100.00    AAA        4,824,557 
  3,750    5.500%, 12/01/28 - FSA Insured    12/13 at 100.00    AAA      4,207,463 
  1,450    Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Peak-to-Peak    8/14 at 100.00    AAA      1,557,344 
      Charter School, Series 2004, 5.250%, 8/15/24 - XLCA Insured               
      Florida - 1.2% (0.8% of Total Investments)               
  3,000    Pinellas County Health Facilities Authority, Florida, Revenue Bonds, Baycare Health System, Series    5/13 at 100.00    A1      3,190,110 
      2003, 5.500%, 11/15/27               
      Georgia - 1.5% (1.0% of Total Investments)               
  3,825    Metropolitan Atlanta Rapid Transit Authority, Georgia, Sales Tax Revenue Bonds, Second Indenture    1/13 at 100.00    AAA      3,997,163 
      Series 2002, 5.000%, 7/01/32 - MBIA Insured               
      Illinois - 3.7% (2.5% of Total Investments)               
  905    Cook County School District 100, Berwyn South, Illinois, General Obligation Refunding Bonds, Series    12/13 at 100.00    Aaa      1,009,491 
      2003B, 5.250%, 12/01/21 (Pre-refunded to 12/01/13) - FSA Insured               
      Cook County School District 145, Arbor Park, Illinois, General Obligation Bonds, Series 2004:               
  3,285    5.125%, 12/01/20 - FSA Insured    12/14 at 100.00    Aaa      3,551,052 
  2,940    5.125%, 12/01/23 - FSA Insured    12/14 at 100.00    Aaa      3,156,825 
  2,500    Illinois Health Facilities Authority, Revenue Bonds, Lake Forest Hospital, Series 2003, 5.250%,    7/13 at 100.00    A-      2,597,525 
      7/01/23               
      Indiana - 8.8% (5.8% of Total Investments)               
  2,500    Evansville, Indiana, Sewerage Works Revenue Refunding Bonds, Series 2003A, 5.000%, 7/01/23 - AMBAC    7/13 at 100.00    AAA      2,637,125 
      Insured               
  2,190    Indiana Bond Bank, Advance Purchase Funding Bonds, Common School Fund, Series 2003B, 5.000%,    8/13 at 100.00    AAA      2,322,583 
      8/01/19 - MBIA Insured               
  1,000    Indiana University, Student Fee Revenue Bonds, Series 2003O, 5.000%, 8/01/22 - FGIC Insured    8/13 at 100.00    AAA      1,057,950 
      IPS Multi-School Building Corporation, Indiana, First Mortgage Revenue Bonds, Series 2003:               
  11,020    5.000%, 7/15/19 - MBIA Insured    7/13 at 100.00    AAA      11,754,814 
  6,000    5.000%, 7/15/20 - MBIA Insured    7/13 at 100.00    AAA      6,386,160 
      Kansas - 2.4% (1.6% of Total Investments)               
  6,250    Kansas Development Finance Authority, Board of Regents, Revenue Bonds, Scientific Research and    4/13 at 102.00    AAA      6,676,188 
      Development Facilities Projects, Series 2003C, 5.000%, 10/01/22 - AMBAC Insured               
      Kentucky - 0.5% (0.3% of Total Investments)               
      Kentucky State Property and Buildings Commission, Revenue Refunding Bonds, Project 77, Series 2003:               
  340    5.000%, 8/01/23 (Pre-refunded to 8/01/13) - MBIA Insured    8/13 at 100.00    AAA      372,803 
  985    5.000%, 8/01/23 (Pre-refunded to 8/01/13) - MBIA Insured    8/13 at 100.00    AAA      1,080,033 
      Louisiana - 2.3% (1.5% of Total Investments)               
  5,785    New Orleans, Louisiana, General Obligation Refunding Bonds, Series 2002, 5.300%, 12/01/27 - FGIC    12/12 at 100.00    AAA      6,274,180 
      Insured               
      Massachusetts - 5.1% (3.4% of Total Investments)               
  9,000    Massachusetts Bay Transportation Authority, Senior Sales Tax Revenue Refunding Bonds, Series 2002A,    7/12 at 100.00    AAA      9,803,070 
      5.000%, 7/01/27 (Pre-refunded to 7/01/12) - FGIC Insured               
  1,125    Massachusetts Development Finance Authority, Revenue Bonds, Middlesex School, Series 2003, 5.125%,    9/13 at 100.00    A1      1,190,160 
      9/01/23               
    3,000    Massachusetts Turnpike Authority, Metropolitan Highway System Revenue Bonds, Senior Series 1997A,    1/07 at 102.00    AAA        3,079,890 
      5.000%, 1/01/37 - MBIA Insured               
      Michigan - 11.6% (7.7% of Total Investments)               
  6,130    Detroit, Michigan, Senior Lien Water Supply System Revenue Bonds, Series 2003A, 5.000%, 7/01/23 -    7/13 at 100.00    AAA      6,504,911 
      MBIA Insured               
  4,465    Detroit, Michigan, Senior Lien Water Supply System Revenue Refunding Bonds, Series 2003C, 5.000%,    7/13 at 100.00    AAA      4,749,867 
      7/01/22 - MBIA Insured               
  10,800    Michigan Strategic Fund, Limited Obligation Resource Recovery Revenue Refunding Bonds, Detroit    12/12 at 100.00    AAA      11,435,256 
      Edison Company, Series 2002D, 5.250%, 12/15/32 - XLCA Insured               
  2,250    Romulus Community Schools, Wayne County, Michigan, General Obligation Refunding Bonds, Series 2001,    5/11 at 100.00    AA      2,407,500 
      5.250%, 5/01/25               
  6,500    Wayne County, Michigan, Limited Tax General Obligation Airport Hotel Revenue Bonds, Detroit    12/11 at 101.00    AAA      6,789,640 
      Metropolitan Wayne County Airport, Series 2001A, 5.000%, 12/01/30 - MBIA Insured               
      Missouri - 1.1% (0.7% of Total Investments)               
      Clay County Public School District 53, Liberty, Missouri, General Obligation Bonds, Series 2004:               
  1,325    5.250%, 3/01/23 - FSA Insured    3/14 at 100.00    AAA      1,440,832 
  1,500    5.250%, 3/01/24 - FSA Insured    3/14 at 100.00    AAA      1,628,865 
      Nebraska - 1.9% (1.3% of Total Investments)               
  5,000    Lincoln, Nebraska, Sanitary Sewerage System Revenue Refunding Bonds, Series 2003, 5.000%,    6/13 at 100.00    AAA      5,267,400 
      6/15/28 - MBIA Insured               
      Nevada - 0.9% (0.6% of Total Investments)               
  2,315    Clark County, Nevada, Subordinate Lien Airport Revenue Bonds, Series 2001B, 5.200%, 7/01/31 - FGIC    7/11 at 100.00    AAA      2,426,398 
      Insured               
      New Mexico - 0.8% (0.5% of Total Investments)               
  1,975    New Mexico State University, Revenue Bonds, Series 2004, 5.000%, 4/01/19 - AMBAC Insured    4/14 at 100.00    AAA      2,119,175 
      New York - 9.5% (6.3% of Total Investments)               
  25,000    Metropolitan Transportation Authority, New York, Transportation Revenue Refunding Bonds, Series    11/12 at 100.00    AAA      26,124,000 
      2002F, 5.000%, 11/15/31 - MBIA Insured               
      North Carolina - 3.3% (2.2% of Total Investments)               
  8,700    North Carolina Medical Care Commission, Revenue Bonds, Maria Parham Medical Center, Series 2003,    10/13 at 100.00    AA      9,190,767 
      5.375%, 10/01/33 - RAAI Insured               
      Ohio - 0.7% (0.5% of Total Investments)               
  1,770    Columbus, Ohio, Tax Increment Financing Bonds, Easton Project, Series 2004A, 5.000%, 12/01/21 -    6/14 at 100.00    AAA      1,876,908 
      AMBAC Insured               
      Oregon - 3.9% (2.6% of Total Investments)               
  9,350    Oregon Health Sciences University, Revenue Bonds, Series 2002A, 5.000%, 7/01/32 - MBIA Insured    1/13 at 100.00    AAA      9,795,154 
  1,000    Sunrise Water Authority, Oregon, Water Revenue Bonds, Series 2004, 5.000%, 3/01/19 - FSA Insured    3/14 at 100.00    AAA      1,072,430 
      Pennsylvania - 8.7% (5.8% of Total Investments)               
  3,000    Lehigh County General Purpose Authority, Pennsylvania, Hospital Revenue Bonds, St. Luke's Hospital    8/13 at 100.00    BBB      3,109,860 
      of Bethlehem, Series 2003, 5.375%, 8/15/33               
  2,000    Philadelphia Gas Works, Pennsylvania, Revenue Bonds, General Ordinance, Fourth Series 1998,    8/13 at 100.00    AAA      2,090,520 
      5.000%, 8/01/32 - FSA Insured               
      Philadelphia, Pennsylvania, Water and Wastewater Revenue Bonds, Series 1997A:               
    925    5.125%, 8/01/27 - AMBAC Insured    8/07 at 102.00    AAA        965,478 
  4,075    5.125%, 8/01/27 - AMBAC Insured    8/07 at 102.00    AAA      4,285,759 
  13,000    State Public School Building Authority, Pennsylvania, Lease Revenue Bonds, Philadelphia School    6/13 at 100.00    AAA      13,586,170 
      District, Series 2003, 5.000%, 6/01/33 - FSA Insured               
      South Carolina - 7.4% (4.9% of Total Investments)               
  5,000    Florence County, South Carolina, Hospital Revenue Bonds, McLeod Regional Medical Center, Series    11/14 at 100.00    AAA      5,414,800 
      2004A, 5.250%, 11/01/23 - FSA Insured               
      Greenville County School District, South Carolina, Installment Purchase Revenue Bonds, Series 2003:               
  3,000    5.000%, 12/01/22    12/13 at 100.00    AA-      3,143,550 
  1,785    5.000%, 12/01/23    12/13 at 100.00    AA-      1,866,592 
  1,365    Myrtle Beach, South Carolina, Water and Sewerage System Revenue Refunding Bonds, Series 2003,    3/13 at 100.00    AAA      1,505,540 
      5.375%, 3/01/19 - FGIC Insured               
  8,000    South Carolina Transportation Infrastructure Bank, Revenue Bonds, Series 2002A, 5.000%, 10/01/33 -    10/12 at 100.00    Aaa      8,344,480 
      AMBAC Insured               
      Texas - 13.0% (8.6% of Total Investments)               
  7,975    Fort Bend Independent School District, Fort Bend County, Texas, General Obligation Bonds, Series    8/10 at 100.00    AAA      8,364,898 
      2000, 5.000%, 8/15/25               
  12,500    Grand Prairie Independent School District, Dallas County, Texas, General Obligation Bonds, Series    2/13 at 100.00    AAA      13,108,875 
      2003, 5.125%, 2/15/31 - FSA Insured               
  5,515    Houston, Texas, General Obligation Refunding Bonds, Series 2002, 5.250%, 3/01/20 - MBIA Insured    3/12 at 100.00    AAA      5,953,718 
  2,000    Houston, Texas, First Lien Combined Utility System Revenue Bonds, Series 2004A, 5.250%, 5/15/25 -    5/14 at 100.00    AAA      2,158,300 
      MBIA Insured               
  5,850    Katy Independent School District, Harris, Fort Bend and Waller Counties, Texas, General Obligation    2/12 at 100.00    AAA      6,293,547 
      Bonds, Series 2002A, 5.125%, 2/15/18               
      Virginia - 0.6% (0.4% of Total Investments)               
  1,500    Hampton, Virginia, Revenue Bonds, Convention Center Project, Series 2002, 5.125%, 1/15/28 - AMBAC    1/13 at 100.00    AAA      1,581,960 
      Insured               
      Washington - 9.2% (6.1% of Total Investments)               
  4,945    Broadway Office Properties, King County, Washington, Lease Revenue Bonds, Washington Project,    12/12 at 100.00    AAA      5,143,245 
      Series 2002, 5.000%, 12/01/31 - MBIA Insured               
  5,250    Chelan County Public Utility District 1, Washington, Hydro Consolidated System Revenue Bonds,    7/12 at 100.00    AAA      5,487,248 
      Series 2002C, 5.125%, 7/01/33 - AMBAC Insured               
  2,135    Kitsap County Consolidated Housing Authority, Washington, Revenue Bonds, Bremerton Government    7/13 at 100.00    Aaa      2,243,885 
      Center, Series 2003, 5.000%, 7/01/23 - MBIA Insured               
  1,935    Pierce County School District 343, Dieringer, Washington, General Obligation Refunding Bonds,    6/13 at 100.00    Aaa      2,120,818 
      Series 2003, 5.250%, 12/01/17 - FGIC Insured               
  9,670    Washington, General Obligation Bonds, Series 2003D, 5.000%, 12/01/21 - MBIA Insured    6/13 at 100.00    AAA      10,261,224 
      West Virginia - 1.2% (0.8% of Total Investments)               
  3,000    West Virginia State Building Commission, Lease Revenue Refunding Bonds, Regional Jail and    No Opt. Call    AAA      3,404,310 
      Corrections Facility, Series 1998A, 5.375%, 7/01/21 - AMBAC Insured               
      Wisconsin - 6.7% (4.4% of Total Investments)               
  1,190    Sun Prairie Area School District, Dane County, Wisconsin, General Obligation Bonds, Series 2004C,    3/14 at 100.00    Aaa      1,286,842 
      5.250%, 3/01/24 - FSA Insured               
  4,750    Wisconsin Health and Educational Facilities Authority, Revenue Refunding Bonds, Wausau Hospital    8/08 at 102.00    AAA      5,010,155 
      Inc., Series 1998A, 5.125%, 8/15/20 - AMBAC Insured               
  3,000    Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Meriter Hospital Inc., Series    No Opt. Call    AAA      3,485,280 
      1992A, 6.000%, 12/01/22 - FGIC Insured             
  3,600    Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Wheaton Franciscan Services    8/13 at 100.00    A        3,688,090
      Inc., Series 2003A, 5.125%, 8/15/33             
  4,605    Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Franciscan Sisters of    9/13 at 100.00    A-      4,947,750
      Christian Charity Healthcare Ministry, Series 2003A, 5.875%, 9/01/33             
$   391,995    Total Long-Term Investments (cost $393,094,577) - 150.9%              415,501,823
      Other Assets Less Liabilities - 1.4%              3,921,911
      Preferred Shares, at Liquidation Value - (52.3)%              (144,000,000)
      Net Assets Applicable to Common Shares - 100%            $   275,423,734

    Forward Swaps outstanding at July 31, 2005:                       
                          Unrealized  
          Notional      Effective     Termination      Appreciation  
          Amount        Date(2)      Date      (Depreciation)  
 
    Agreement with Goldman Sachs dated January 10, 2005, to pay                       
    semi-annually the notional amount multiplied by 5.251% (annualized)                       
    and receive quarterly the notional amount multiplied by the                       
    three-month USD-LIBOR (United States Dollar-London                       
    Inter-Bank Offered Rates).        $9,000,000      8/16/05     8/16/25        $(374,186 ) 
 
    Agreement with Citigroup dated June 29, 2005, to pay semi-                       
    annually the notional amount multiplied by 4.652% (annualized)                       
    and receive quarterly the notional amount multiplied by the three-month                       
    USD-LIBOR (United States Dollar-London Inter-Bank Offered Rates).      13,500,000      2/22/06     2/22/26      521,066  
 
    Agreement with Citigroup dated June 30, 2005, to pay semi-                       
    annually the notional amount multiplied by 4.699% (annualized)                       
    and receive quarterly the notional amount multiplied by the three-month                       
    USD-LIBOR (United States Dollar-London Inter-Bank Offered Rates).      3,000,000      2/27/06     2/27/26      98,488  
 
                            $245,368  
 
 
 
    At least 80% of the Fund’s net assets (including net assets attributable to Preferred shares) are invested in                 
    municipal securities that are either covered by Original Issue Insurance, Secondary Market Insurance or                 
    Portfolio Insurance which ensures the timely payment of principal and interest. Up to 20% of the Fund’s net                 
    assets (including net assets attributable to Preferred shares) may be invested in municipal securities that are                 
    (i) either backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency                 
    securities (also ensuring the timely payment of principal and interest), or (ii) municipal bonds that are rated,                 
    at the time of investment, within the four highest grades (Baa or BBB or better by Moody’s, S&P or Fitch) or                 
    unrated but judged to be of comparable quality by the Adviser.                       
(1 )    All percentages shown in the Portfolio of Investments are based on net assets applicable to Common shares                 
    unless otherwise noted.                       
(2 )    Effective date represents the date on which both the Fund and counterparty commence interest payment                 
    accruals on each forward swap contract.                       
*     Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There                 
    may be other call provisions at varying prices at later dates.                       
**     Ratings: Using the higher of Standard & Poor's or Moody's rating.                       
(PLG)     Portion of security, with an aggregate market value of $609,944, has been pledged to collateralize the net                 
    payment obligations under forward swap contracts.                       
 
    Income Tax Information                       
 
    The following information is presented on an income tax basis. Differences between amounts for financial statement                 
    and federal income tax purposes are primarily due to timing differences in recognizing income on taxable market                 
    discount securities and timing differences in recognizing certain gains and losses on investment transactions.                 
 
    At July 31, 2005, the cost of investments was $393,070,669.                       
 
    Gross unrealized appreciation and gross unrealized depreciation of investments at July 31, 2005, were as                 
    follows:                       
 
    Gross unrealized:                       
       Appreciation                        $22,431,154  
       Depreciation                      -  
 
    Net unrealized appreciation of investments                        $22,431,154  

Item 2. Controls and Procedures.

  1. The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
  2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: EX-99 CERT Attached hereto.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)         Nuveen Insured Tax-Free Advantage Municipal Fund        

By (Signature and Title)*          /s/ Jessica R. Droeger--Vice President and Secretary        

Date         09/29/05        

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)*         /s/ Gifford R. Zimmerman--Chief Administrative Officer (principal executive officer)        

Date         09/29/05        

By (Signature and Title)*         /s/ Stephen D. Foy--Vice President and Controller (principal financial officer)        

Date         09/29/05        

* Print the name and title of each signing officer under his or her signature.