EXHIBIT 23.2

               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in the
Registration Statement on Form S-3 and related Prospectus of Genzyme
Corporation for the registration of $575,000,000 in principal amount of
Genzyme Corporation's 3% Convertible Subordinated Debentures Due May 15, 2021,
8,179,231 shares of Genzyme General Division common stock, 2,000,000 shares of
Genzyme Biosurgery Division common stock and 2,000,000 shares of Genzyme
Molecular Oncology Division common stock and to the incorporation by reference
therein of our report dated January 31, 2001, with respect to the financial
statements of Focal, Inc. included in its Annual Report (Form 10-K) for the
year ended December 31, 2000 filed with the Securities and Exchange Commission.

                              /s/ Ernst & Young LLP

Boston, Massachusetts
July 25, 2001