-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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MIC-Info: RSA-MD5,RSA,
 RMWvwssKP9wCMH5DqMSOrU5PC5qb0BEpploYp/y+ASzx7P2/CJ41qC0+BGw8sp+J
 DroIVisi0GHp8yafQH67jw==

<SEC-DOCUMENT>0000318259-09-000001.txt : 20090129
<SEC-HEADER>0000318259-09-000001.hdr.sgml : 20090129
<ACCEPTANCE-DATETIME>20090129181036
ACCESSION NUMBER:		0000318259-09-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090129
FILED AS OF DATE:		20090129
DATE AS OF CHANGE:		20090129

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Knepper Peter B
		CENTRAL INDEX KEY:			0001341288

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-09463
		FILM NUMBER:		09555555

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		3105444659

	MAIL ADDRESS:	
		STREET 1:		3004 PALOS VERDES DRIVE WEST
		CITY:			PALOS VERDES ESTATES
		STATE:			CA
		ZIP:			90274

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MDI, INC.
		CENTRAL INDEX KEY:			0000318259
		STANDARD INDUSTRIAL CLASSIFICATION:	PHOTOGRAPHIC EQUIPMENT & SUPPLIES [3861]
		IRS NUMBER:				752626358
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0422

	BUSINESS ADDRESS:	
		STREET 1:		10226 SAN PEDRO AVENUE
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78216
		BUSINESS PHONE:		210-582-2664

	MAIL ADDRESS:	
		STREET 1:		10226 SAN PEDRO AVENUE
		CITY:			SAN ANTONIO
		STATE:			TX
		ZIP:			78216

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMERICAN BUILDING CONTROL INC
		DATE OF NAME CHANGE:	20030103

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ULTRAK INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-01-29</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000318259</issuerCik>
        <issuerName>MDI, INC.</issuerName>
        <issuerTradingSymbol>MDII</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001341288</rptOwnerCik>
            <rptOwnerName>Knepper Peter B</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3004 PALOS VERDES DRIVE WEST</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PALOS VERDES ESTATES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90274</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.18</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2009-01-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>15000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.18</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2009-01-01</value>
            </exerciseDate>
            <expirationDate>
                <value>2014-01-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>285000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <ownerSignature>
        <signatureName>Peter Knepper</signatureName>
        <signatureDate>2009-01-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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