Exhibit 99.1

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Millipore Corporation (the "Company") on
Form 10-K for the fiscal year ended December 31, 2002 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Francis
J. Lunger, Chief Executive Officer of the Company, certify, pursuant to 18
U.S.C. (S) 1350, as adopted pursuant to (S) 906 of the Sarbanes-Oxley Act of
2002, that:

     (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.




/s/ Francis J. Lunger



Francis J. Lunger
Chief Executive Officer
March 12, 2003