LIFE SCIENCES RESEARCH, INC. AND SUBSIDIARIES


                                                                  Exhibit 32.2


                            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 Quarterly Report of Life Sciences Research, Inc. (LSR) on
Form 10-Q for the period ended March 31, 2004, as filed with the  Securities and
Exchange  Commission on the date hereof (the "Report"),  I, Richard  Michaelson,
Chief Financial Officer of LSR, certify,  pursuant to 18 U.S.C. Section 1350, as
adopted pursuant to Section 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, as amended and

     (2)  The  Information  contained  in the  report  fairly  presents,  in all
          material respects,  the financial  condition and results of operations
          of LSR.

Date:    May 6, 2004

                                              /s/ Richard Michaelson
                                              ------------------------------

                                              Richard Michaelson
                                              Chief Financial Officer
                                              (Principal Financial Officer)