<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
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        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001336007</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0000105770</issuerCik>
            <issuerName>WEST PHARMACEUTICAL SERVICES INC.</issuerName>
            <secFileNumber>001-08036</secFileNumber>
            <issuerAddress>
                <ns2:street1>530 Herman O. West Drive</ns2:street1>
                <ns2:city>Exton</ns2:city>
                <ns2:stateOrCountry>PA</ns2:stateOrCountry>
                <ns2:zipCode>19341-0645</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>610-594-2900</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ERIC GREEN</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>38th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>44000</noOfUnitsSold>
            <aggregateMarketValue>17369818.40</aggregateMarketValue>
            <noOfUnitsOutstanding>73861212</noOfUnitsOutstanding>
            <approxSaleDate>08/08/2023</approxSaleDate>
            <securitiesExchangeName>NYSE</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>08/08/2023</acquiredDate>
            <natureOfAcquisitionTransaction>Stock Option Exercise</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>44000</amountOfSecuritiesAcquired>
            <paymentDate>08/08/2023</paymentDate>
            <natureOfPayment>Cash</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>08/08/2023</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>05/05/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Eric Mark Green</signature>
        </noticeSignature>
    </formData>
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144
0001336007
XXXXXXXX
LIVE
0000105770
WEST PHARMACEUTICAL SERVICES INC.
001-08036
530 Herman O. West Drive
Exton
PA
19341-0645
610-594-2900
ERIC GREEN
Officer
Director
Common
Morgan Stanley Smith Barney LLC
1 New York Plaza
38th Floor
New York
NY
10004
44000
17369818.40
73861212
08/08/2023
NYSE
Common
08/08/2023
Stock Option Exercise
Issuer
N
44000
08/08/2023
Cash
Y
08/08/2023
05/05/2023
/s/ Eric Mark Green