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EXHIBIT 23.1
INDEPENDENT AUDITORS' CONSENT
We consent to the incorporation by reference in this Amendment No. 1 to
Registration Statement No. 333-38664 of ARIAD Pharmaceuticals, Inc. on Form S-3
of our report dated February 4, 2000 (which report expresses an unqualified
opinion and includes an explanatory paragraph referring to a change in
accounting principle relating to accounting for start-up activities), appearing
in the Annual Report on Form 10-K of ARIAD Pharmaceuticals, Inc. for the year
ended December 31, 1999, and to the reference to us under the heading "Experts"
in the Prospectus, which is part of such Registration Statement.
/s/ DELOITTE & TOUCHE LLP
Boston, Massachusetts
June 23, 2000
