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  <xs:element id="ctas_InterestRateContract2020Member" abstract="true" name="InterestRateContract2020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ctas_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityBusinessCombination" abstract="false" name="RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityBusinessCombination" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ctas_EffectiveIncomeTaxRateReconciliationAdjustmentsForPermanentDifferencesAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationAdjustmentsForPermanentDifferencesAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ctas_DeferredTaxLiabilitiesTreasuryLocks" abstract="false" name="DeferredTaxLiabilitiesTreasuryLocks" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="ctas_AccumulatedOtherAdjustmentAttributabletoParentMember" abstract="true" name="AccumulatedOtherAdjustmentAttributabletoParentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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</xs:schema>
