Exhibit 32.1





       Bio-Rad Laboratories, Inc.,

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

       We, Norman Schwartz and Christine A. Tsingos, of Bio-Rad
       Laboratories, Inc. (the "Registrant"), do hereby certify in
       accordance with 18 U.S.C. Section 1350, as adopted  pursuant to
       Section 906 of the Sarbanes-Oxley Act of 2002, that to our
       knowledge:

            1.   the Quarterly Report on Form 10-Q of the Registrant, to
                 which this certificate is attached as an exhibit (the
                 "Report"), fully complies with the requirements of
                 section 13(a) of the Securities Exchange Act of 1934 (15
                 U.S.C. 78m); and

            2.   the information contained in the Report fairly presents,
                 in all material respects, the financial condition and
                 results of operations of the Registrant.





       Dated:   August 6, 2003               /s/ Norman Schwartz
                                             Norman Schwartz
                                             Chief Executive Officer

       Dated:   August 6, 2003               /s/ Christine A. Tsingos
                                             Christine A. Tsingos
                                             Vice President,
                                             Chief Financial Officer