EXHIBIT 32.1

                               CAMBREX CORPORATION
     CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
                            (18 U.S.C. SECTION 1350)

Pursuant to the requirements of Section 906 of the Sarbanes-Oxley Act of 2002
(18 U.S.C. Sections 1350 (a) and (b)), the undersigned hereby certify as
follows:

     1.   James A. Mack is the President, Chairman of the Board and Chief
          Executive Officer of Cambrex Corporation.

     2.   The Company's Form 10-Q for the quarterly period ended September 30,
          2003, accompanying this Certification, in the form filed with the
          Securities and Exchange Commission (the "Report") fully complies with
          the requirements of Section 13(a) of the Securities Exchange Act of
          1934 (the "Exchange Act") and

     3.   The information in the Report fairly presents, in all material
          respects, the financial condition and results of operation of the
          Company.

Dated: November 10, 2003

                                             /s/ James A. Mack
                                             ------------------------------
                                             James A. Mack, President
                                             Chairman of the Board and
                                             Chief Executive Officer

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