LIMITED POWER OF ATTORNEY
                          FOR SECTION 16(A) REPORTING

      KNOW  ALL  PERSONS  BY  THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Laurie Stelzer, James R. Oehler and
Doug   Rein,   and   each   of  them,  as  the  undersigned's  true  and  lawful
attorney-in-fact  (the  "Attorney-in Fact"), with full power of substitution and
resubstitution,  each with the power to act alone for the undersigned and in the
undersigned's name, place and stead, in any and all capacities to:

      1.  prepare,  execute,  deliver and file with the United States Securities
and   Exchange   Commission,  any  national  securities  exchange  and  Halozyme
Therapeutics,  Inc. (the "Company") any and all reports (including any amendment
thereto) of the undersigned required or considered advisable under Section 16(a)
of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the
rules  and  regulations thereunder, with respect to the equity securities of the
Company,  including  Form  3  (Initial  Statement  of  Beneficial  Ownership  of
Securities),  Form  4 (Statement of Changes in Beneficial Ownership), and Form 5
(Annual Statement of Changes in Beneficial Ownership); and

      2.  seek  or  obtain,  as  the  undersigned's  representative  and  on the
undersigned's  behalf,  information  on  transactions  in  the  Company's equity
securities  from  any  third  party,  including  the  Company, brokers, dealers,
employee  benefit  plan  administrators and trustees, and the undersigned hereby
authorizes  any  such  third  party  to  release  any  such  information  to the
Attorney-in-Fact.

         The undersigned acknowledges that:

      1.  this  Limited  Power of Attorney authorizes, but does not require, the
Attorney-in-Fact to act at his or her discretion on information provided to such
Attorney-in-Fact without independent verification of such information;

      2.  any  documents  prepared  and/or  executed  by the Attorney-in-Fact on
behalf  of the undersigned pursuant to this Limited Power of Attorney will be in
such  form  and will contain such information as the Attorney-in-Fact, in his or
her discretion, deems necessary or desirable;

      3.  neither the Company nor the Attorney-in-Fact assumes any liability for
the  undersigned's  responsibility to comply with the requirements of Section 16
of  the Exchange Act, any liability of the undersigned for any failure to comply
with  such requirements, or any liability of the undersigned for disgorgement of
profits under Section 16(b) of the Exchange Act; and

      4.  this  Limited  Power of Attorney does not relieve the undersigned from
responsibility  for  compliance with the undersigned's obligations under Section
16   of   the  Exchange  Act,  including,  without,  limitation,  the  reporting
requirements under Section 16(a) of the Exchange Act.

      The  undersigned  hereby  grants  to  the  Attorney-in-Fact full power and
authority to do and perform each and every act and thing requisite, necessary or
convenient to be done in connection with the foregoing, as fully, to all intents
and  purposes,  as the undersigned might or could do in person, hereby ratifying
and  confirming  all  that  the  Attorney-in-Fact,  or  his or her substitute or
substitutes,  shall lawfully do or cause to be done by authority of this Limited
Power of Attorney.

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

      This  Limited  Power  of  Attorney  shall  be  governed  and  construed in
accordance  the  laws of the State of California without regard to the laws that
might otherwise govern under applicable principles of conflicts of laws thereof.

      IN  WITNESS  WHEREOF,  the  undersigned  has  caused this Limited Power of
Attorney to be executed as of December 19, 2019.

                                  Signature:   /s/ Masaru Matsuda
                                               ---------------------------------
                                  Print Name:  Masaru Matsuda