Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  Blackmore R Gregoire
 2. Date of Event Requiring Statement (Month/Day/Year)
12/16/2008		 3. Issuer Name and Ticker or Trading Symbol
STERIS CORP [STE]
(Last)
(First)
(Middle)
5960 HEISLEY ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
SVP & Group President, L.S.
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

MENTOR, OH 44060		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Shares, No Par Value 6,760 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Option to Purchase Common Shares 05/16/2009 06/16/2015 Common Shares, No Par Value 1,969 $ 24.45 D  
Option to Purchase Common Shares   (2) 09/12/2016 Common Shares, No Par Value 4,688 $ 24.72 D  
Option to Purchase Common Shares   (3) 07/27/2017 Common Shares, No Par Value 4,538 $ 27.68 D  
Option to Purchase Common Shares   (4) 05/21/2018 Common Shares, No Par Value 8,750 $ 30.84 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Blackmore R Gregoire
5960 HEISLEY ROAD
MENTOR, OH 44060		       SVP & Group President, L.S.  

Signatures

Dennis P. Patton, Authorized Representative under Power of Attorney 12/18/2008
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) All 6,760 of these Common Shares are restricted. The restrictions on these Common Shares lapse as follows: 1,910 on September 7, 2009, 2,000 on July 27, 2010, and 2,850 on May 23, 2011.
(2) These options became or become exercisable as follows: 1,562 on September 12, 2008, 1,563 on September 12, 2009 and 1,563 on September 12, 2010.
(3) These options become exercisable as follows: 1,512 on July 27, 2009, 1,513 on July 27, 2010 and 1,513 on July 27, 2011.
(4) These options become exercisable as follows: 2,187 on May 21, 2009, 2,187 on May 21, 2010, 2,188 on May 21, 2011 and 2,188 on May 21, 2012.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.