##### 



Exhibit 32 CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 I, Craig H. Neilsen, President and Chief Executive Officer of Ameristar Casinos, Inc. (the
Company), certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the
Sarbanes-Oxley Act of 2002, that to my knowledge: 1. the Annual Report on Form 10-K of the Company for the year ended December 31, 2004, as
filed with the Securities and Exchange Commission (the Report), fully complies with the
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. the information contained in the Report fairly presents, in all material respects, the
financial condition and results of operations of the Company. Dated: March 16, 2005
    
    /s/ Craig H. Neilsen by C. WilsonCraig H. NeilsenPresident and Chief Executive Officer of Ameristar Casinos, Inc.
 On this 16th day of March 2005, Craig H. Neilsen directed Connie Wilson, in his presence as well as
our own, to sign the foregoing document as Craig H. Neilsen. Upon viewing the signature as
signed by Connie Wilson, and in our presence, Craig H. Neilsen declared to us that he adopted it as
his own signature. /s/  Janet CatronWitness/s/  Shirley LizotteWitness
 STATE
OF NEVADA
    )):ssCOUNTY OF CLARK
    )
 I, Margene M. Otten, Notary Public in and for said county and state, do hereby certify that
Craig H. Neilsen personally appeared before me and is known or identified to me to be the person
whose name is subscribed to the within instrument in his capacity as President and Chief Executive
Officer of Ameristar Casinos, Inc. Craig H. Neilsen, who being unable due to physical incapacity to
sign his own name or offer his mark, did direct Connie Wilson, in his presence, as well as my own,
to sign the foregoing document as Craig H. Neilsen. Craig H. Neilsen, after viewing his name as
signed by Connie Wilson, thereupon adopted it as his own by acknowledging to me his intention to so
adopt it as if he had personally executed the same, and further acknowledged to me that he executed
the same as the President and Chief Executive Officer of Ameristar Casinos, Inc. IN WITNESS WHEREOF,I have hereunto set my hand and official seal this 16th day of
March 2005. /s/ Margene M. OttenNotary Public
 My Commission Expires: July 23, 2006 Residing at: Las Vegas, NV




---



##### 



I, Thomas M. Steinbauer, Senior Vice President of Finance, Chief Financial Officer and Treasurer of
Ameristar Casinos, Inc. (the Company), certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant
to § 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge: 1. the Annual Report on Form 10-K of the Company for the year ended December 31, 2004, as
filed with the Securities and Exchange Commission (the Report), fully complies with the
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. the information contained in the Report fairly presents, in all material respects, the
financial condition and results of operations of the Company. Dated: March 16, 2005
    
    /s/ Thomas M. SteinbauerThomas M. SteinbauerSenior Vice President of Finance, Chief FinancialOfficer and Treasurer of Ameristar Casinos, Inc.
 This certification accompanies the Report pursuant to §906 of the Sarbanes-Oxley Act of 2002 and
shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the
Company for purposes of §18 of the Securities Exchange Act of 1934, as amended.