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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 AIgHzTI0W0F8lgTviq/YnETRbDJ8RzOtRp5kpw4GkBXGD0vB+7gaJNwRY+5eZDNu
 zzJaPQeUZAB5Xg6K5/OnBg==

<SEC-DOCUMENT>0001225208-07-008344.txt : 20070914
<SEC-HEADER>0001225208-07-008344.hdr.sgml : 20070914
<ACCEPTANCE-DATETIME>20070914102140
ACCESSION NUMBER:		0001225208-07-008344
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070913
FILED AS OF DATE:		20070914
DATE AS OF CHANGE:		20070914

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			US BioEnergy CORP
		CENTRAL INDEX KEY:			0001332341
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL ORGANIC CHEMICALS [2860]
		IRS NUMBER:				201811472

	BUSINESS ADDRESS:	
		STREET 1:		5500 CENEX DRIVE
		STREET 2:		MAIL STATION 175
		CITY:			INVER GROVE HEIGHTS
		STATE:			MN
		ZIP:			55077
		BUSINESS PHONE:		(651) 355-8300

	MAIL ADDRESS:	
		STREET 1:		5500 CENEX DRIVE
		STREET 2:		MAIL STATION 175
		CITY:			INVER GROVE HEIGHTS
		STATE:			MN
		ZIP:			55077

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	US BioEnergy Corp
		DATE OF NAME CHANGE:	20050707

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CHS INC
		CENTRAL INDEX KEY:			0000823277
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-FARM PRODUCT RAW MATERIALS [5150]
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			0831

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33203
		FILM NUMBER:		071116672

	BUSINESS ADDRESS:	
		STREET 1:		5500 CENEX DRIVE
		CITY:			INVER GROVE HEIGHTS
		STATE:			MN
		ZIP:			55077
		BUSINESS PHONE:		651-355-6000

	MAIL ADDRESS:	
		STREET 1:		5500 CENEX DRIVE
		CITY:			INVER GROVE HEIGHTS
		STATE:			MN
		ZIP:			55077

	FORMER NAME:	
		FORMER CONFORMED NAME:	CENEX HARVEST STATES COOPERATIVES
		DATE OF NAME CHANGE:	19980611

	FORMER NAME:	
		FORMER CONFORMED NAME:	HARVEST STATES COOPERATIVES
		DATE OF NAME CHANGE:	19961212
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-09-13</periodOfReport>

    <issuer>
        <issuerCik>0001332341</issuerCik>
        <issuerName>US BioEnergy CORP</issuerName>
        <issuerTradingSymbol>USBE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000823277</rptOwnerCik>
            <rptOwnerName>CHS INC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5500 CENEX DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>INVER GROVE HEIGHTS</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55077</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>1</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common</value>
            </securityTitle>
            <transactionDate>
                <value>2007-09-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>140500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>10.364</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15734688</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>David A. Kastelic</signatureName>
        <signatureDate>2007-09-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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