EXHIBIT 24
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                                POWER OF ATTORNEY

        Know all men by these presents, that the undersigned hereby constitutes
and appoints each of N. Cris Prince, Ana G. Rodriguez, Ellen L. Gams and Mark A.
Schlossberg, signing singly, the undersigned's true and lawful attorney-in-fact
to execute for and on behalf of the undersigned Forms 3, 4 and 5 in accordance
with Section 16(a) of the Securities Exchange Act of 1934, as amended, and the
rules thereunder, as may be required as a result of the undersigned's position
as an officer and/or director of Amgen Inc. (the "Company").

        The undersigned hereby grants to each such attorney-in-fact full power
and authority to execute such Forms 3, 4 and 5 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 as of this 4th day of Jaunary, 2005.


                                                      /s/ Frank J. Biondi, Jr.
                                                      --------------------------
                                                      Name: Frank J. Biondi, Jr.