MENTOR GRAPHICS CORPORATION

                        SPECIAL INCENTIVE BONUS PLAN

                              January 1, 1995


Mentor Graphics Corporation
an Oregon Corporation
8005 SW Boeckman Road
Wilsonville, OR  97070-7777                                        Mentor


          Mentor recognizes that its continuing success measured in terms
of growth of its revenue and profit depends critically on the initiative
and performance of its key executives and technologists. Mentor believes
that by rewarding its key executives and technologists for enhancing those
corporate goals, their performance will be motivated to Mentor's benefit.

          Mentor therefore adopts this Special Incentive Bonus Plan.

     1. Effective Date

          The Plan is effective January 1, 1995.

     2. Eligibility

          2.01 Positions eligible to participate in the Plan shall be
selected by Mentor's Chief Executive Officer (CEO) from Mentor's Operating
Committee members and key technologist positions selected by the CEO.

          2.02 Employees in the eligible positions shall participate in
bonuses as provided in the Plan.

          2.03 Participants shall be notified in writing of their
participation in the Plan.

     3. Annual Plan

          3.01 The years 1995, 1996 and 1997 shall be Plan Years.

          3.02 For each Plan Year, Mentor's Board of Directors shall
establish an annual plan which shall include planned goals for Mentor's
total revenues and net income.

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     4. Bonus

          4.01 Each Plan Year that Mentor's actual net income (ANI) equals
or exceeds planned net income (PNI), there shall be a bonus for each
participant equal to 1/2 of 1 percent of base pay for every full percent
(if any) by which actual total revenues exceed planned total revenues, plus
1 percent of base pay for every full percent (if any) by which ANI exceeds
PNI.

          4.02 The term "total revenues" shall be as reported in Mentor's
published annual reports to shareholders. The term "net income" shall be as
reported in Mentor's published annual reports to shareholders, as adjusted
from time to time by the Compensation Committee of Mentor's Board of
Directors for accounting items attributable to performance in a different
fiscal period (such as the reversal in the current period of items accrued
in a prior period) or that are otherwise determined by the Compensation
Committee to reflect matters considered by the Committee not to be
attributable to the initiative or performance desired of participants for
the plan year in question. The Compensation Committee's exercise of
discretion in this regard shall be final and binding on all affected
persons.

          4.03 The term "base pay" shall mean the midpoint of the pay range
for the participant's pay grade under Mentor's compensation programs as in
effect on the April 30 of the Plan Year to which it relates. Where a change
occurs, the amount shall be understood to be the amount determined as of
the last day of the Plan Year.

          4.04 If a participant occupies a participating position for less
than a full Plan Year, the bonus shall be based on prorated base pay for
the period of service in the Plan Year.

          4.05 If more than one participant occupies a participating
position in a Plan Year, there shall be separate bonuses based on the
prorated base pay of each.

          4.06 Bonuses are payable and subject to forfeiture as provided in
5.

     5. Payment and Forfeiture of Bonuses

          5.01 Subject to 5.02 and 5.03, bonuses shall be payable to
participants as follows:

               (a) Twenty five percent of any bonus for 1995 shall be
     payable in the first quarter of 1996 and the balance deferred until
     the first quarter of 1998.

               (b) Fifty percent of any bonus for 1996 shall be payable in
     the first quarter of 1997 and the balance deferred until the first
     quarter of 1998.

               (c) The entire amount of any bonus for 1997 shall be payable
     in the first quarter of 1998.

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          5.02 Bonuses shall be subject to forfeiture as follows:

               (a) If a participant is not an employee of Mentor or an
     affiliate on the last day of a Plan Year, the participant shall
     forfeit the entire amount of any bonus for that Plan Year.

               (b) If a participant is not an employee of Mentor or an
     affiliate on December 31, 1997, the participant shall forfeit the
     entire amount of any deferred bonuses.

               (c) Forfeiture shall not apply if termination of a
     participant's employment with Mentor resulted from the participant's
     death or retirement or disability under the Mentor Graphics Individual
     Deferred Tax and Savings Plan.

          5.03 Payment of a bonus shall occur as follows:

               (a) Subject to (b), payment of a bonus shall occur as soon
     as practicable after the beginning of the quarter in which it is
     payable.

               (b) Prior to paying any bonus payable under (a), Mentor
     shall determine, using reasonable projections and estimates of amounts
     not yet paid where necessary, whether the payment, when taken together
     with an employee's other applicable employee remuneration, would
     result in the employee's receiving nondeductible remuneration for a
     taxable year under Internal Revenue Code sec. 162(m). If it would,
     payment of the bonus will be deferred and carried forward to
     succeeding taxable years to the extent necessary to allow
     deductibility.

     6. Nontransferability

          No interest of any participant may be assigned, transferred,
seized by legal process or subjected to the claims of creditors in any way.

     7. Administration

          7.01 The Plan shall be administered by the CEO, who may delegate
any administrative duties to one or more agents and who may retain
advisors, consultants or counsel, who may be advisors, consultants or
counsel to Mentor.

          7.02 The Administrator shall have general responsibility to
interpret and administer the Plan. Any decision by the Administrator shall
be final and bind all parties. The Administrator shall be responsible for
communicating with participants.

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     8. Claims

          8.01 Any person claiming a benefit or requesting an
interpretation, information or a ruling under the Plan shall present the
request in writing to the Administrator, who shall respond in writing as
soon as practicable.

          8.02 If a claim or request is denied, the written notice of
denial shall state:

               (a) The reasons for the denial, with specific reference to
     the plan provisions on which the denial is based;

               (b) A description of any additional material or information
     required and an explanation of why it is necessary;

               (c) An explanation of the Plan's claim review procedure.

          8.03 Any person whose claim or request is denied or who has not
received a response within 30 days may request review by notice in writing
to the Administrator. The original decision shall be reviewed by the
Administrator who may, but shall not be required to, grant the claimant a
hearing. On review, whether or not there is a hearing, the claimant may
have representation, examine pertinent documents and submit issues and
comments in writing.

          8.04 The decision on review shall ordinarily be made within 60
days. If an extension of time is required for a hearing or other special
circumstances the claimant shall be notified and the time limit shall be
120 days. The decision shall be in writing and shall state the reasons and
the relevant plan provisions. All decisions on review shall be final and
bind all parties concerned.

     9. Not a Contract of Employment

          Nothing in this Plan shall confer on any participant, or be
construed to confer on any participant, the right to continued employment
or an acquired right to any compensation under the Plan. The Plan shall not
prevent the termination of any participant's employment at any time for any
reason.

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     10. Amendment and Termination

          Mentor's Board of Directors may amend or terminate this Plan at
any time.

     Adopted: May 4, 1995

      Mentor                        MENTOR GRAPHICS CORPORATION



                                    By DEAN FREED
                                       -----------------------------------
                                    Its Vice Presdient and General Counsel

                                    Executed as of June 1, 1995