<SEC-DOCUMENT>0001228924-13-000021.txt : 20131210
<SEC-HEADER>0001228924-13-000021.hdr.sgml : 20131210
<ACCEPTANCE-DATETIME>20131210112538
ACCESSION NUMBER:		0001228924-13-000021
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20131209
FILED AS OF DATE:		20131210
DATE AS OF CHANGE:		20131210

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MESA LABORATORIES INC /CO
		CENTRAL INDEX KEY:			0000724004
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		IRS NUMBER:				840872291
		STATE OF INCORPORATION:			CO
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		12100 W 6TH AVE
		CITY:			LAKEWOOD
		STATE:			CO
		ZIP:			80228
		BUSINESS PHONE:		3039878000

	MAIL ADDRESS:	
		STREET 1:		12100 W 6TH AVE
		CITY:			LAKEWOOD
		STATE:			CO
		ZIP:			80228

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MESA MEDICAL INC
		DATE OF NAME CHANGE:	19921123

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Adriance Glenn E
		CENTRAL INDEX KEY:			0001431535

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-11740
		FILM NUMBER:		131267551

	MAIL ADDRESS:	
		STREET 1:		12100 W 6TH AVENUE
		CITY:			LAKEWOOD
		STATE:			CO
		ZIP:			80228
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
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        <issuerTradingSymbol>MLAB</issuerTradingSymbol>
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        </reportingOwnerId>
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            <rptOwnerStreet1>12100 W 6TH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LAKEWOOD</rptOwnerCity>
            <rptOwnerState>CO</rptOwnerState>
            <rptOwnerZipCode>80228</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Sales and Marketing Offi</officerTitle>
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    </reportingOwner>

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                <directOrIndirectOwnership>
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        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
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            <transactionDate>
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    <derivativeTable>
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            <securityTitle>
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            </securityTitle>
            <conversionOrExercisePrice>
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            </conversionOrExercisePrice>
            <transactionDate>
                <value>2013-12-09</value>
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                <transactionFormType>4</transactionFormType>
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                <footnoteId id="F1"/>
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            <expirationDate>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>1100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <exerciseDate>
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                <footnoteId id="F3"/>
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                <value>2021-04-06</value>
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                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <sharesOwnedFollowingTransaction>
                    <value>11250</value>
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                <directOrIndirectOwnership>
                    <value>D</value>
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                <transactionFormType>4</transactionFormType>
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                <value></value>
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                <transactionShares>
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                <transactionPricePerShare>
                    <value>0</value>
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                    <value>D</value>
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            <exerciseDate>
                <value>2013-04-02</value>
                <footnoteId id="F4"/>
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            <expirationDate>
                <value>2022-04-02</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                    <value>1000</value>
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                <sharesOwnedFollowingTransaction>
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    <footnotes>
        <footnote id="F1">1/8 of 25% grant exercisable on each of the first 4 anniversary dates following 10/1/2007</footnote>
        <footnote id="F2">25% of grant exercisable on each of the first 4 anniversary dates following 04/1/2010</footnote>
        <footnote id="F3">25% of grant exercisable on each of the first 4 anniversary dates following 4/6/2011</footnote>
        <footnote id="F4">25% of grant exercisable on each of the first 4 anniversary dates following 4/2/2012</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Glenn Adriance</signatureName>
        <signatureDate>2013-12-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
