Exhibit 32.1

Certification Pursuant to § 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, in connection with the filing of the Form 10-Q of STERIS Corporation (the “Company”) for the quarter ended June 30, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company certifies, that, to such officer’s knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods expressed in the Report.

/s/ Les C. Vinney
Name:	Les C. Vinney
Title:	President and Chief Executive Officer (Principal Executive Officer)
/s/ Laurie Brlas
Name:	Laurie Brlas
Title:	Senior Vice President and Chief Financial Officer
	(Principal Financial and Accounting Officer)

Dated: August 9, 2005