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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001508792-11-000003.txt : 20110110
<SEC-HEADER>0001508792-11-000003.hdr.sgml : 20110110
<ACCEPTANCE-DATETIME>20110110134153
ACCESSION NUMBER:		0001508792-11-000003
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
ITEM INFORMATION:		Investment Company Act Section 3(c)
ITEM INFORMATION:		Section 3(c)(7)
FILED AS OF DATE:		20110110
DATE AS OF CHANGE:		20110110
EFFECTIVENESS DATE:		20110110

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Pantheon Global Infrastructure Fund B, L.P.
		CENTRAL INDEX KEY:			0001508792
		IRS NUMBER:				274358938
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-153313
		FILM NUMBER:		11519702

	BUSINESS ADDRESS:	
		STREET 1:		TRANSAMERICA CENTER
		STREET 2:		600 MONTGOMERY STREET, 23RD FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		415-249-6200

	MAIL ADDRESS:	
		STREET 1:		TRANSAMERICA CENTER
		STREET 2:		600 MONTGOMERY STREET, 23RD FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Pantheon Global Infrastructure Fund B, LP
		DATE OF NAME CHANGE:	20101223
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001508792</cik>
        <entityName>Pantheon Global Infrastructure Fund B, L.P.</entityName>
        <issuerAddress>
            <street1>TRANSAMERICA CENTER</street1>
            <street2>600 MONTGOMERY STREET, 23RD FLOOR</street2>
            <city>SAN FRANCISCO</city>
            <stateOrCountry>CA</stateOrCountry>
            <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
            <zipCode>94111</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>415-249-6200</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <edgarPreviousNameList>
            <previousName>Pantheon Global Infrastructure Fund B, LP</previousName>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2010</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>N/A</firstName>
                <lastName>PGIF GP, LLC</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Transamerica Center</street1>
                <street2>600 Montgomery Street, 23rd Floor</street2>
                <city>San Francisco</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94111</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>N/A</firstName>
                <lastName>Pantheon Ventures Inc.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Transamerica Center</street1>
                <street2>600 Montgomery Street, 23rd Floor</street2>
                <city>San Francisco</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94111</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Sole Member of the General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>N/A</firstName>
                <lastName>Pantheon Ventures (US) LP</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Transamerica Center</street1>
                <street2>600 Montgomery Street, 23rd Floor</street2>
                <city>San Francisco</city>
                <stateOrCountry>CA</stateOrCountry>
                <stateOrCountryDescription>CALIFORNIA</stateOrCountryDescription>
                <zipCode>94111</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Advisor of the Issuer</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Private Equity Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-12-30</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>100000000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>200000000</totalOfferingAmount>
            <totalAmountSold>200000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>2</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>1150000</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>Estimate of the first 12 months of annual management fees</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Pantheon Global Infrastructure Fund B, L.P.</issuerName>
                <signatureName>/s/ Lily Wong</signatureName>
                <nameOfSigner>Lily Wong</nameOfSigner>
                <signatureTitle>Director of Pantheon Ventures Inc. the Sole Member of the GP</signatureTitle>
                <signatureDate>2011-01-05</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
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</SEC-DOCUMENT>
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