EXHIBIT 32
Certification
Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)
Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of ImmunoGen, Inc., a Massachusetts corporation (the “Company”), does hereby certify, to such officer’s knowledge, that:
The Quarterly Report for the period ended September 30, 2005 (the “Form 10-Q”) of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.
| Dated: November 8, 2005 | /s/ Mitchel Sayare | |
| Mitchel Sayare | ||
| Chairman of the Board of Directors,Chief Executive Officer and President | ||
| Dated: November 8, 2005 | /s/ Daniel M. Junius | |
| Daniel M. Junius | ||
| Senior Vice President and Chief Financial Officer | ||