Exhibit 32



Certification of Periodic Financial Report Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002



Pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, the undersigned officer of Mentor Graphics Corporation (the Company) hereby certifies to such officers knowledge that:



(i) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2004 (the
Report) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and



(ii) the information contained in the Report fairly presents, in all material respects, the financial
condition and results of operations of the Company.



|                        |  |                        
|----------------------- |  | -----------------------
|Dated: November 9, 2004 |  | /s/ Walden C. Rhines   
|                        |  | Walden C. Rhines       
|                        |  | Chief Executive Officer



The foregoing certification is being
furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the
Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing. A signed original of this written statement required by Section 906 has been provided to Mentor Graphics Corporation and will be
retained by Mentor Graphics Corporation and furnished to the Securities and Exchange Commission or its staff upon request.



Certification of Periodic Financial Report Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002



Pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, the undersigned officer of Mentor Graphics Corporation (the Company) hereby certifies to such officers knowledge that:



(i) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2004 (the
Report) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and



(ii) the information contained in the Report fairly presents, in all material respects, the financial
condition and results of operations of the Company.



|                        |  |                        
|----------------------- |  | -----------------------
|Dated: November 9, 2004 |  | /s/ Gregory K. Hinckley
|                        |  | Gregory K. Hinckley    
|                        |  | Chief Financial Officer



The foregoing certification is being
furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the
Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing. A signed original of this written statement required by Section 906 has been provided to Mentor Graphics Corporation and will be
retained by Mentor Graphics Corporation and furnished to the Securities and Exchange Commission or its staff upon request.