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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 QJQ/Z1E5zsAGkT0NMAbQxmeMDM3oRRS9KiM3yuDVY8ICtrklrd2vx7rzxTCJVk+j
 3Aw7xOg6i/jLt3H4GDg0yg==

<SEC-DOCUMENT>0001051924-06-000001.txt : 20060103
<SEC-HEADER>0001051924-06-000001.hdr.sgml : 20060102
<ACCEPTANCE-DATETIME>20060103103453
ACCESSION NUMBER:		0001051924-06-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051230
FILED AS OF DATE:		20060103
DATE AS OF CHANGE:		20060103

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CUBIC ENERGY INC
		CENTRAL INDEX KEY:			0000319156
		STANDARD INDUSTRIAL CLASSIFICATION:	DRILLING OIL & GAS WELLS [1381]
		IRS NUMBER:				870352095
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		9870 PLANO ROAD
		STREET 2:		9870 PLANO ROAD
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75238
		BUSINESS PHONE:		972-681-8047

	MAIL ADDRESS:	
		STREET 1:		9870 PLANO ROAD
		STREET 2:		9870 PLANO ROAD
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75238

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ROSELAND OIL & GAS INC
		DATE OF NAME CHANGE:	19931025

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WALLEN CALVIN III
		CENTRAL INDEX KEY:			0001051924

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-09355
		FILM NUMBER:		06500400

	BUSINESS ADDRESS:	
		STREET 1:		1720 NORTHWEST HIGHWAY
		STREET 2:		SUITE 1320
		CITY:			GARLAND
		STATE:			TX
		ZIP:			75041
		BUSINESS PHONE:		9726818047

	MAIL ADDRESS:	
		STREET 1:		9870 PLANO ROAD
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75238
</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>2005-12-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000319156</issuerCik>
        <issuerName>CUBIC ENERGY INC</issuerName>
        <issuerTradingSymbol>qbik</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001051924</rptOwnerCik>
            <rptOwnerName>WALLEN CALVIN III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>9870 PLANO ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DALLAS</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>75238</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President / CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.85</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9615712</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Calvin Wallen III</signatureName>
        <signatureDate>2006-01-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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