Exhibit 24.1


                               POWER OF ATTORNEY

      Know all by these presents, that the undersigned hereby authorizes each of
Gil M. Labrucherie, Senior Vice President and Chief Financial Officer of Nektar
Therapeutics (the "Company"), Mark Wilson, Vice President and General Counsel of
the Company, and Marie Antoinette Chavez, Senior Corporate Counsel of the
Company to execute for and on behalf of the undersigned, in the undersigned's
capacity as an executive officer of the Company, Forms 3, 4 and 5, and any
amendments thereto, and cause such form(s) to be filed with the United States
Securities and Exchange Commission pursuant to Section 16(a) of the Securities
Act of 1934, relating to the undersigned's beneficial ownership of securities in
the Company.  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.

      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 as of this 21st day of September, 2016.


                                    /s/  R. Scott Greer
                                    --------------------------------------------
                                    R. SCOTT GREER