<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24bernitz.txt
<TEXT>
                       POWER OF ATTORNEY

     Know all by these presents, that the undersigned hereby
constitutes and appoints each of Safi R. Bahcall, Ph.D., the
President and Chief Executive Officer of Synta Pharmaceuticals Corp.
(the "Company"), Keith S. Ehrlich, the Vice President, Finance and
Administration, Chief Financial Officer of the Company, and Wendy E.
Rieder, the Vice President, Intellectual Property and Legal Affairs,
General Counsel of the Company, and Brian Keane, Garrett Winslow,
Christina Frangos and Laura Graham of Mintz, Levin, Cohn, Ferris,
Glovsky and Popeo, P.C., signing singly, with full power of
substitution, the undersigned's true and lawful attorney-in-fact to:

     (1)   execute for and on behalf of the undersigned, in the
           undersigned's capacity as an officer, director and/or 10%
           shareholder of the Company, forms and authentication
           documents for EDGAR Filing Access;

     (2)   do and perform any and all acts for and on behalf of the
           undersigned which may be necessary or desirable to complete
           and execute any such forms and authentication documents;

     (3)   execute for and on behalf of the undersigned, in the
           undersigned's capacity as an officer, director and/or 10%
           shareholder of the Company, Forms 3, 4 and 5 in accordance
           with Section 16(a) of the Securities Exchange Act of 1934
           and the rules thereunder;

     (4)   do and perform any and all acts for and on behalf of the
           undersigned which may be necessary or desirable to complete
           and execute any such Form 3, 4 or 5 and timely file such
           form with the United States Securities and Exchange
           Commission and any stock exchange or similar authority; and

     (5)   take any other action of any type whatsoever in connection
           with the foregoing which, in the opinion of such attorney-
           in-fact, may be of benefit to, in the best interests of, or
           legally required by the undersigned, it being understood
           that the documents executed by such attorney-in-fact on
           behalf of the undersigned pursuant to this Power of
           Attorney shall be in such form and shall contain such terms
           and conditions as such attorney-in-fact may approve in such
           attorney-in-fact's discretion.

     The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform any and every act and thing
whatsoever requisite, necessary, or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all
intents and purposes as the undersigned might or could do if
personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or
such attorney-in-fact's substitute or substitutes, shall lawfully do
or cause to be done by virtue of this power of attorney and the
rights and powers herein granted.  The undersigned acknowledges that
the foregoing attorneys-in-fact, in serving in such capacity at the
request of the undersigned, are not assuming, nor is the Company
assuming, any of the undersigned's responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934, as amended.

     This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3, 4 and 5
with respect to the undersigned's holdings of and transactions in
securities issued by the Company, unless earlier revoked by the
undersigned in a signed writing delivered to the foregoing attorneys-
in-fact.

     IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed this 18th day of December 2013.

/s/ Steven Bernitz
------------------
Signature

Name: Steven Bernitz

</TEXT>
</DOCUMENT>
