-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001129787-06-000163.txt : 20060918
<SEC-HEADER>0001129787-06-000163.hdr.sgml : 20060918
<ACCEPTANCE-DATETIME>20060918164627
ACCESSION NUMBER:		0001129787-06-000163
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060914
FILED AS OF DATE:		20060918
DATE AS OF CHANGE:		20060918

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MENTOR CORP /MN/
		CENTRAL INDEX KEY:			0000064892
		STANDARD INDUSTRIAL CLASSIFICATION:	ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
		IRS NUMBER:				410950791
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		201 MENTOR DR
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93111
		BUSINESS PHONE:		8058796000

	MAIL ADDRESS:	
		STREET 1:		201 MENTOR DR
		CITY:			SANTA BARBARA
		STATE:			CA
		ZIP:			93111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ValueAct Capital Management, L.P.
		CENTRAL INDEX KEY:			0001351069
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31744
		FILM NUMBER:		061096115

	BUSINESS ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VA PARTNERS LLC
		CENTRAL INDEX KEY:			0001129787
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31744
		FILM NUMBER:		061096116

	BUSINESS ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE
		STREET 2:		FOURTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
		BUSINESS PHONE:		4153623700

	MAIL ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE
		STREET 2:		FOURTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			UBBEN JEFFREY W
		CENTRAL INDEX KEY:			0001159187
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31744
		FILM NUMBER:		061096117

	BUSINESS ADDRESS:	
		STREET 1:		ONE MARITIME PLAZA, SUITE 1400
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		4153623700

	MAIL ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE, FOURTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ValueAct Capital Management, LLC
		CENTRAL INDEX KEY:			0001351073
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31744
		FILM NUMBER:		061096118

	BUSINESS ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
		BUSINESS PHONE:		415-362-3700

	MAIL ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE, 4TH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-09-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000064892</issuerCik>
        <issuerName>MENTOR CORP /MN/</issuerName>
        <issuerTradingSymbol>MNT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001159187</rptOwnerCik>
            <rptOwnerName>UBBEN JEFFREY W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>435 PACIFIC AVENUE, FOURTH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94133</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001129787</rptOwnerCik>
            <rptOwnerName>VA PARTNERS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>435 PACIFIC AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>FOURTH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94133</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001351069</rptOwnerCik>
            <rptOwnerName>ValueAct Capital Management, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>435 PACIFIC AVENUE, 4TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94133</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001351073</rptOwnerCik>
            <rptOwnerName>ValueAct Capital Management, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>435 PACIFIC AVENUE, 4TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94133</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2006-09-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2007-09-14</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-09-14</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>2500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7357</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Restrictions on stock lapse ratably over 5 years on each anniversary date.</footnote>
        <footnote id="F2">Column 8 is not a required reportable field.</footnote>
        <footnote id="F3">Under an agreement with ValueAct Capital Master Fund, L.P., Jeffrey W. Ubben is deemed to hold the shares for the benefit of ValueAct Capital Master Fund, L.P. and indirectly for (i) VA Partners, L.L.C. as General Partner of ValueAct Capital Master Fund, L.P. (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P. and (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P  Jeffrey W. Ubben is a director of Mentor Corporation and Managing Member of VA Partners, L.L.C. and ValueAct Capital Management, LLC.  Peter H. Kamin and George F. Hamel are Managing Members of VA Partners, L.L.C. and ValueAct Capital Management, LLC. The reporting persons disclaim beneficial ownership of the reported stock except to the extent of their pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>Joint Filer Information:

Name: ValueAct Capital Master Fund, L.P.,
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Mentor Corporation, (MNT)
Date of Event Requiring Statement: September 14, 2006

Name: VA Partners, L.L.C.
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Mentor Corporation, (MNT)
Date of Event Requiring Statement: September 14, 2006

Name: ValueAct Capital Management, L.P.
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Mentor Corporation, (MNT)
Date of Event Requiring Statement: September 14, 2006

Name: ValueAct Capital Management, LLC
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Mentor Corporation, (MNT)
Date of Event Requiring Statement: September 14, 2006

Name: George F. Hamel, Jr.
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Mentor Corporation, (MNT)
Date of Event Requiring Statement: September 14, 2006

Name: Peter H. Kamin
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Mentor Corporation, (MNT)
Date of Event Requiring Statement: September 14, 2006</remarks>

    <ownerSignature>
        <signatureName>/s/ Jeffrey W. Ubben</signatureName>
        <signatureDate>2006-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VA PARTNERS, LLC, By:/s/ George F. Hamel, Jr., Managing Member</signatureName>
        <signatureDate>2006-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL MASTER FUND, L.P., By:  VA PARTNERS, LLC, its General Partner, By:/s/ George F. Hamel, Jr., Managing Member</signatureName>
        <signatureDate>2006-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL  MANAGEMENT, L.P., By:  VALUEACT CAPITAL MANAGEMENT, LLC, its General Partner, By:/s/ George F. Hamel, Jr., Managing Member</signatureName>
        <signatureDate>2006-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL MANAGEMENT, LLC, By:/s/ George F. Hamel, Jr., Managing Member</signatureName>
        <signatureDate>2006-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ George F. Hamel, Jr.</signatureName>
        <signatureDate>2006-09-18</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Peter H. Kamin</signatureName>
        <signatureDate>2006-09-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----