EX-99.906CERT



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



JEFFREY L. STEELE,  President and PEO, and Michael W.  Stockton,  Vice President
and Treasurer of Washington Mutual Investors 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
         April 30, 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.


Chief Executive Officer                     Principal Financial Officer

WASHINGTON MUTUAL                   WASHINGTON MUTUAL
INVESTORS FUND, INC.                INVESTORS FUND, INC.

/s/ Jeffrey L. Steele, President   /s/ Michael W. Stockton, Vice President,
And Principal Executive Officer        Treasurer and Principal Financial Officer

Date:  December 28, 2005             Date: December 28, 2005


A signed original of this written statement required by Section 906 of the
Sarbanes-Oxley Act of 2002 has been provided to WASHINGTON MUTUAL INVESTORS
FUND, INC. and will be retained by WASHINGTON MUTUAL INVESTORS 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.