Exhibit 31.1
**CERTIFICATION PURSUANT TO SECTION 302****OF THE SARBANES-OXLEY ACT OF 2002**
     I, Jack A. Hockema, certify that:
     1. I have reviewed this report on Form 10-Q of Kaiser Aluminum & Chemical Corporation;
     2. Based on my knowledge, this report does not contain any untrue statement of a material factor omit to state a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading with respect to the periodcovered by this report;
     3. Based on my knowledge, the financial statements, and other financial information includedin this report, fairly present in all material respects the financial condition, results ofoperations and cash flows of the registrant as of, and for, the periods presented in this report;
     4. The registrant’s other certifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) [text omitted in accordance with SEC transition instructions set forth in SEC ReleaseNo. 34-47986] for the registrant and we have:
 a)  designed such disclosure controls and procedures, or caused such disclosurecontrols and procedures to be designed under our supervision, to ensure that materialinformation relating to the registrant, including its consolidated subsidiaries, is madeknown to us by others within those entities, particularly during the period in whichthis report is being prepared;  b)  [paragraph omitted in accordance with SEC transition instructions set forth inSEC Release No. 34-47986]  c)  evaluated the effectiveness of the registrant’s disclosure controls andprocedures and presented in this report our conclusions about the effectiveness of thedisclosure controls and procedures as of the end of the period covered by this reportbased on such evaluation; and  d)  disclosed in this report any changes in the registrant’s internal control overfinancial reporting that occurred during the registrant’s most recent fiscal quarter(the registrant’s fourth fiscal quarter in the case of an annual report) that hasmaterially affected, or is reasonably likely to materially affect, the registrant’sinternal control over financial reporting.
     5. The registrant’s other certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to the registrant’s auditors and the auditcommittee of the registrant’s board of directors (or persons performing the equivalent function):
 a)  all significant deficiencies and material weaknesses in the design or operationof internal control over financial reporting which are reasonably likely to adverselyaffect the registrant’s ability to record, process, summarize and report financialinformation; and  b)  any fraud, whether or not material, that involves management or other employeeswho have a significant role in the registrant’s internal control over financialreporting.   Date: May 13, 2005 /s/ Jack A. Hockema   Jack A. Hockema Chief Executive Officer
A signed original of this written statement required by Section 302 has been provided to KaiserAluminum & Chemical Corporation and will be retained by Kaiser Aluminum & Chemical Corporation andfurnished to the Securities and Exchange Commission or its staff upon request.