Exhibit 23.1
Consent of Ernst & Young, LLP, Independent Auditors
We consent to the reference to our firm under the caption "Experts" in
Amendment No. 1 to the Registration Statement (Form S-3) and related prospectus
of Genentech, Inc., for the registration of 6,517,309 shares of its common
stock, and to the incorporation by reference therein of our reports dated
January 18, 2000, with respect to the consolidated financial statements of
Genentech, Inc. incorporated by reference in its Annual Report (Form 10-K) for
the year ended December 31, 1999, and the related financial statement schedule
included therein, filed with the Securities and Exchange Commission.
San Jose, California
August 2, 2000
/s/ Ernst & Young LLP
