Exhibit 23.2


                CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" and to
the use of our report dated February 22, 2000, with respect to the financial
statements of GelTex Pharmaceuticals, Inc. incorporated by reference in the
Registration Statement and related Proxy Statement/Prospectus of Genzyme
Corporation for the registration of 8,677,672 shares of its common stock.




/s/ Ernst & Young LLP

Boston, Massachusetts
October 30, 2000