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

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-03-15</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001075247</issuerCik>
        <issuerName>BIG SKY ENERGY CORP</issuerName>
        <issuerTradingSymbol>BSKO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001322530</rptOwnerCik>
            <rptOwnerName>BALGIMBAYEV NURLAN UTEBOVICH</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5, CHAYKINA STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ALMATY</rptOwnerCity>
            <rptOwnerState>1P</rptOwnerState>
            <rptOwnerZipCode>00000</rptOwnerZipCode>
            <rptOwnerStateDescription>KAZAKSTAN</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.89</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2006-03-29</value>
            </exerciseDate>
            <expirationDate>
                <value>2008-03-29</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1000000</value>
                    <footnoteId id="F1"/>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Board of Directors awarded Mr. Balgimbayev a total of 5,000,000 Stock Options under the Company's 2000 Stock Award Plan (as amended).  1,000,000 of these stock options is awarded as of the date of his election to the Board, with the remainder to be put to a vote of the shareholders at the next Annual Meeting of Shareholders.</footnote>
    </footnotes>

    <remarks>Mr. Balgimbayev was elected to the board of directors of Big Sky Energy Corporation on March 29, 2005.</remarks>

    <ownerSignature>
        <signatureName>/s/ Nancy M. Swyer - Attorney-in-fact</signatureName>
        <signatureDate>2005-04-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
