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EXHIBIT 23.1
CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
We consent to the reference to our firm under the caption "Experts"
in the Registration Statement (Form S-3) and related Prospectus of Commerce
One, Inc. for the registration of 6,320,628 shares of its common stock and to
the incorporation by reference therein of our report dated January 21, 2000,
with respect to the consolidated financial statements and financial statement
schedule of Commerce One, Inc. included in its Annual Report (Form 10-K) for
the year ended December 31, 1999, filed with the Securities and Exchange
Commission.
/s/ Ernst & Young LLP
Walnut Creek, California
July 17, 2000
