

<!-- RR Donnelley Xcelerate Taxonomy Schema, based on XBRL 2.1  http://www.rrdonnelley.com/ -->
<!-- Version: 6.22.4 -->
<!-- Round: 3 -->
<!-- Creation date: 2015-05-07T19:18:52Z -->
<!-- Copyright (c) 2005-2013 R.R. Donnelley & Sons Company All Rights Reserved. -->
<schema xmlns="http://www.w3.org/2001/XMLSchema"
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  xmlns:currency="http://xbrl.sec.gov/currency/2014-01-31"
  xmlns:dei="http://xbrl.sec.gov/dei/2014-01-31"
  xmlns:exch="http://xbrl.sec.gov/exch/2014-01-31"
  xmlns:invest="http://xbrl.sec.gov/invest/2013-01-31"
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  xmlns:sic="http://xbrl.sec.gov/sic/2011-01-31"
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  <annotation>
    <appinfo>
      <link:roleType roleURI="http://www.pcconnection.com/taxonomy/role/DocumentandEntityInformation" id="DocumentandEntityInformation">
        <link:definition>101 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.pcconnection.com/taxonomy/role/StatementOfFinancialPositionClassified" id="Role_StatementOfFinancialPositionClassified">
        <link:definition>103 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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      <link:roleType roleURI="http://www.pcconnection.com/taxonomy/role/StatementOfIncome" id="Role_StatementOfIncome">
        <link:definition>104 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>105 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>106 - Disclosure - Basis of Presentation</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>107 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>108 - Disclosure - Segment and Related Disclosures</link:definition>
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        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>109 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.pcconnection.com/taxonomy/role/NotesToFinancialStatementsDebtDisclosureTextBlock" id="Role_NotesToFinancialStatementsDebtDisclosureTextBlock">
        <link:definition>110 - Disclosure - Bank Borrowing and Trade Credit Arrangements</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>111 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>112 - Disclosure - Segment and Related Disclosures (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.pcconnection.com/taxonomy/role/DisclosureBasisOfPresentationAdditionalInformation" id="DisclosureBasisOfPresentationAdditionalInformation">
        <link:definition>113 - Disclosure - Basis of Presentation - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>114 - Disclosure - Computation of Basic and Diluted Earnings Per Share (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>115 - Disclosure - Earnings Per Share - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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        <link:definition>116 - Disclosure - Segment and Related Disclosures - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:roleType roleURI="http://www.pcconnection.com/taxonomy/role/DisclosureSegmentInformationApplicableToReportableOperatingSegment" id="DisclosureSegmentInformationApplicableToReportableOperatingSegment">
        <link:definition>117 - Disclosure - Segment Information Applicable to Reportable Operating Segment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
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        <link:definition>118 - Disclosure - Bank Borrowings and Trade Credit Arrangements - Additional information (Detail)</link:definition>
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</schema>





