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                                AMCAP Fund, Inc.
                             333 South Hope Street
                       Los Angeles, California 90071-1406
                              Phone (213) 486 9200



                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


CLAUDIA P.  HUNTINGTON,  President  and PEO, and JEFFREY P. REGAL,  Treasurer of
AMCAP Fund,  Inc.,  (the  "Registrant"),  each certify to the best of his or her
knowledge that:

1)   The  Registrant's  periodic  report  on Form  N-CSR  for the  period  ended
     February 28, 2005 (the "Form N-CSR") fully  complies with the  requirements
     of  Section  13(a) or  15(d) of the  Securities  Exchange  Act of 1934,  as
     amended; and

2)   The  information  contained  in the  Form  N-CSR  fairly  presents,  in all
     material respects, the financial condition and results of operations of the
     Registrant.


Principal Executive Officer                      Principal Financial Officer

AMCAP FUND, INC.                                 AMCAP FUND, INC.


/s/ Claudia P. Huntington                        /s/ Jeffrey P. Regal
- --------------------------------                 ---------------------------
Claudia P. Huntington, President                 Jeffrey P. Regal, Treasurer

Date: May 6, 2005                                Date: May 6, 2005


A signed  original  of this  written  statement  required  by Section 906 of the
Sarbanes-Oxley  Act of 2002 has been  provided to AMCAP FUND,  INC.  and will be
retained by AMCAP FUND,  INC.  and  furnished  to the  Securities  and  Exchange
Commission (the "Commission") or its staff upon request.

This  certification  is being furnished to the Commission  solely pursuant to 18
U.S.C.  Section 1350 and is not being filed as part of the Form N-CSR filed with
the Commission.