<?xml version="1.0" encoding="UTF-8"?>
<edgarSubmission xmlns="http://www.sec.gov/edgar/thirteenffiler" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>13F-HR/A</submissionType>
    <filerInfo>
      <liveTestFlag>LIVE</liveTestFlag>
      <flags>
        <confirmingCopyFlag>false</confirmingCopyFlag>
        <returnCopyFlag>false</returnCopyFlag>
        <overrideInternetFlag>false</overrideInternetFlag>
      </flags>
      <filer>
        <credentials>
          <cik>0001396835</cik>
          <ccc>XXXXXXXX</ccc>
        </credentials>
      </filer>
      <periodOfReport>12-31-2018</periodOfReport>
    </filerInfo>
  </headerData>
  <formData>
    <coverPage>
      <reportCalendarOrQuarter>12-31-2018</reportCalendarOrQuarter>
      <isAmendment>true</isAmendment>
      <amendmentNo>1</amendmentNo>
      <amendmentInfo>
        <amendmentType>RESTATEMENT</amendmentType>
      </amendmentInfo>
      <filingManager>
        <name>ALPINE ASSOCIATES MANAGEMENT INC.</name>
        <address>
          <com:street1>574 SYLVAN AVENUE</com:street1>
          <com:street2>SUITE 100</com:street2>
          <com:city>ENGLEWOOD CLIFFS</com:city>
          <com:stateOrCountry>NJ</com:stateOrCountry>
          <com:zipCode>07632</com:zipCode>
        </address>
      </filingManager>
      <reportType>13F HOLDINGS REPORT</reportType>
      <form13FFileNumber>028-12478</form13FFileNumber>
      <provideInfoForInstruction5>N</provideInfoForInstruction5>
    </coverPage>
    <signatureBlock>
      <name>Todd Mason</name>
      <title>Chief Operating Officer</title>
      <phone>201-871-0866</phone>
      <signature>Todd Mason</signature>
      <city>Englewood Cliffs</city>
      <stateOrCountry>NJ</stateOrCountry>
      <signatureDate>02-14-2019</signatureDate>
    </signatureBlock>
    <summaryPage>
      <otherIncludedManagersCount>0</otherIncludedManagersCount>
      <tableEntryTotal>51</tableEntryTotal>
      <tableValueTotal>2397226</tableValueTotal>
      <isConfidentialOmitted>false</isConfidentialOmitted>
    </summaryPage>
  </formData>
</edgarSubmission>
