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EXHIBIT 23.1
INDEPENDENT AUDITORS' CONSENT
We consent to the incorporation by reference in this Registration
Statement 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
this Registration Statement.
/s/ DELOITTE & TOUCHE LLP
Boston, Massachusetts
June 6, 2000
