<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-07-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001309082</issuerCik>
        <issuerName>LUCAS ENERGY, INC.</issuerName>
        <issuerTradingSymbol>AMEX:LEI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001376883</rptOwnerCik>
            <rptOwnerName>Sawyer William Alexander</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3555 TIMMONS LANE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1550</rptOwnerStreet2>
            <rptOwnerCity>HOUSTON</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>77027</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-07-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>6721</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.79</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>364446</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>2.07</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2011-03-31</value>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <value>2020-10-07</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>24000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>224000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Options</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>4.05</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2012-04-01</value>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-04-01</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>200000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>224000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Effective as of April 1, 2011, the Issuer entered into an employment agreement with William A. Sawyer pursuant to which he agreed to serve as Chief Executive Officer of the Issuer. Pursuant to the employment agreement Mr. Sawyer is due a base salary of $250,000 per year, of which $175,000 is payable in cash and $75,000 is payable in shares of the Issuer's common stock on a pro-rata, quarterly basis. Effective July 1, 2011, the Issuer was obligated to issue Mr. Sawyer 6,721 shares of common stock, valued at $2.79 per share (the closing price of the Issuer's common stock on July 1, 2011) or approximately $18,750 in aggregate, representing one quarter's worth of the total value of shares Mr. Sawyer is due on a yearly basis pursuant to the terms of his employment agreement.</footnote>
        <footnote id="F2">On October 7, 2010, the Issuer's Board of Directors approved the issuance to Mr. Sawyer of 17,500 shares of common stock under the Issuer's 2010 Long Term Incentive Plan (the &quot;Plan&quot;) in the event the net production of the Issuer averages over 10,000 barrels of oil per month for a period of six months (which shares have not been issued or earned by Mr. Sawyer to date, and therefore have not been included in the table above).</footnote>
        <footnote id="F3">Represents the date that last portion of the Stock Option vested to Mr. Sawyer.</footnote>
        <footnote id="F4">Effective April 1, 2011, the Issuer's Board of Directors approved the grant to Mr. Sawyer of 200,000 options to purchase shares of common stock of the Issuer in consideration for services to be rendered to the Issuer during the April 1, 2011 to March 31, 2015 fiscal years as the Chief Executive Officer of the Issuer, which options had an exercise price of $4.05 per share and vest in tranches of 1/4th of such options per year pursuant to the Plan. The disclosure in the table above only discloses the date the first tranche is exercisable.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ William A. Sawyer</signatureName>
        <signatureDate>2011-07-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
