-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 NpIqGvnon5v4eAED7oWnKDuIBeR84PrpFNerkHoRxnSF4KGAwl/c2jUIULC3MyrC
 px62YohOWqzK9+WZUOpF9w==

<SEC-DOCUMENT>0001129787-05-000077.txt : 20050611
<SEC-HEADER>0001129787-05-000077.hdr.sgml : 20050611
<ACCEPTANCE-DATETIME>20050603162504
ACCESSION NUMBER:		0001129787-05-000077
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050601
FILED AS OF DATE:		20050603
DATE AS OF CHANGE:		20050603

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:			KAMIN PETER H
		CENTRAL INDEX KEY:			0000937541
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31744
		FILM NUMBER:		05877957

	BUSINESS ADDRESS:	
		STREET 1:		40 BRIARCLIFF RD
		CITY:			LONGMEADOW
		STATE:			MA
		ZIP:			01106
		BUSINESS PHONE:		6179605570

	MAIL ADDRESS:	
		STREET 1:		TWO INTERNATIONAL PLACE, 25TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

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:		05877959

	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:			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:		05877960

	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
</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>2005-06-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <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>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <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>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000937541</rptOwnerCik>
            <rptOwnerName>KAMIN PETER H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TWO INTERNATIONAL PLACE, 25TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02110</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-06-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>18000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>41.05</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4631818</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-06-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>482000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>41.22</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4149818</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">As General Partner of ValueAct Capital Master Fund, L.P. and ValueAct Capital
Partners Co-Investors, L.P.</footnote>
        <footnote id="F2">The reported stock is owned directly by ValueAct Capital Master Fund, L.P. and ValueAct Capital Partners Co-Investors, L.P. and indirectly by VA Partners, LLC as general partner of ValueAct Capital Master Fund, L.P. and ValueAct Capital Partners Co-Investors, L.P.  Jeffrey W. Ubben is a director of Mentor Corporation and Managing Member of VA Partners, LLC, the General Partner. Peter H. Kamin and George F. Hamel are Managing Members of VA Partners, LLC, the General Partner.  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: VA Partners, L.L.C.
Issuer and Ticker Symbol: Mentor Corporation (MNT)
Date of Event Requiring Statement: June 1, 2005

Name: ValueAct Capital Partners Co-Investors, L.P.
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: VA Partners, L.L.C.
Issuer and Ticker Symbol: Mentor Corporation (MNT)
Date of Event Requiring Statement: June 1, 2005

Name: Jeffrey W. Ubben
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: VA Partners, L.L.C.
Issuer and Ticker Symbol: Mentor Corporation (MNT)
Date of Event Requiring Statement: June 1, 2005

Name: George F. Hamel, Jr.
Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133
Designated Filer: VA Partners, L.L.C.
Issuer and Ticker Symbol: Mentor Corporation (MNT)
Date of Event Requiring Statement: June 1, 2005

Name: Peter H. Kamin
Address: Two International Place, 25th Floor, Boston, MA  02110
Designated Filer: VA Partners, L.L.C.
Issuer and Ticker Symbol: Mentor Corporation (MNT)
Date of Event Requiring Statement: June 1, 2005</remarks>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL MASTER FUND, L.P., BY VA PARTNERS, L.L.C., ITS GENERAL PARTNER By: /s/ George F. Hamel, Jr. Managing Member</signatureName>
        <signatureDate>2005-06-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL PARTNERS CO-INVESTORS, L.P., BY VA PARTNERS, L.L.C., ITS GENERAL PARTNER By: /s/ George F. Hamel, Jr. Managing Member</signatureName>
        <signatureDate>2005-06-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VA PARTNERS, L.L.C. By: /s/ George F. Hamel, Jr. Managing Member</signatureName>
        <signatureDate>2005-06-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: /s/ Jeffrey W. Ubben</signatureName>
        <signatureDate>2005-06-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: /s/ George F. Hamel, Jr.</signatureName>
        <signatureDate>2005-06-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: /s/ Peter H. Kamin</signatureName>
        <signatureDate>2005-06-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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