<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.20.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>262</ContextCount>
  <ElementCount>386</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>77</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>14</UnitCount>
  <MyReports>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Consolidated Statement of Financial Position</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/StatementConsolidatedStatementOfFinancialPosition</Role>
      <ShortName>Consolidated Statement of Financial Position</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00200 - Statement - Consolidated Statement of Profit or Loss and Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/StatementConsolidatedStatementOfProfitOrLossAndComprehensiveIncome</Role>
      <ShortName>Consolidated Statement of Profit or Loss and Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00300 - Statement - Consolidated Statement of Changes in Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/StatementConsolidatedStatementOfChangesInEquity</Role>
      <ShortName>Consolidated Statement of Changes in Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00400 - Statement - Consolidated Statement of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/StatementConsolidatedStatementOfCashFlows</Role>
      <ShortName>Consolidated Statement of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>10101 - Disclosure - General Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureGeneralInformation</Role>
      <ShortName>General Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>10201 - Disclosure - Basis of Preparation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureBasisOfPreparation</Role>
      <ShortName>Basis of Preparation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSignificantAccountingPolicies</Role>
      <ShortName>Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10401 - Disclosure - New standards and interpretations not yet adopted</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureNewStandardsAndInterpretationsNotYetAdopted</Role>
      <ShortName>New standards and interpretations not yet adopted</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Financial Risk Management</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureFinancialRiskManagement</Role>
      <ShortName>Financial Risk Management</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Property, Plant and Equipment ('PP&amp;E')</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosurePropertyPlantAndEquipmentPpE</Role>
      <ShortName>Property, Plant and Equipment ('PP&amp;E')</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Investments in associates</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureInvestmentsInAssociates</Role>
      <ShortName>Investments in associates</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Social Security and Other Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSocialSecurityAndOtherTaxes</Role>
      <ShortName>Social Security and Other Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Prepayments and Other Receivables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosurePrepaymentsAndOtherReceivables</Role>
      <ShortName>Prepayments and Other Receivables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Cash and Cash Equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCashAndCashEquivalents</Role>
      <ShortName>Cash and Cash Equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Shareholders??? equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureShareholdersEquity</Role>
      <ShortName>Shareholders??? equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Non-current liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureNonCurrentLiabilities</Role>
      <ShortName>Non-current liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Current liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCurrentLiabilities</Role>
      <ShortName>Current liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Other income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureOtherIncome</Role>
      <ShortName>Other income</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11601 - Disclosure - Research and Development costs</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureResearchAndDevelopmentCosts</Role>
      <ShortName>Research and Development costs</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11701 - Disclosure - Employee Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureEmployeeBenefits</Role>
      <ShortName>Employee Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>11801 - Disclosure - Financial Income and Expense</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureFinancialIncomeAndExpense</Role>
      <ShortName>Financial Income and Expense</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>11901 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>12001 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureEarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>12101 - Disclosure - Leases</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureLeases</Role>
      <ShortName>Leases</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>12201 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>12301 - Disclosure - Related-Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related-Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>12401 - Disclosure - Auditor fees</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureAuditorFees</Role>
      <ShortName>Auditor fees</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>12501 - Disclosure - Subsequent events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>Subsequent events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>20302 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureSignificantAccountingPolicies</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSignificantAccountingPoliciesTables</Role>
      <ShortName>Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureSignificantAccountingPolicies</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Financial Risk Management (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureFinancialRiskManagementTables</Role>
      <ShortName>Financial Risk Management (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureFinancialRiskManagement</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Property, Plant and Equipment ('PP&amp;E') (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosurePropertyPlantAndEquipmentPpETables</Role>
      <ShortName>Property, Plant and Equipment ('PP&amp;E') (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosurePropertyPlantAndEquipmentPpE</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Investments in associates (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureInvestmentsInAssociatesTables</Role>
      <ShortName>Investments in associates (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureInvestmentsInAssociates</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Social Security and Other Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSocialSecurityAndOtherTaxesTables</Role>
      <ShortName>Social Security and Other Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureSocialSecurityAndOtherTaxes</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Prepayments and Other Receivables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosurePrepaymentsAndOtherReceivablesTables</Role>
      <ShortName>Prepayments and Other Receivables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosurePrepaymentsAndOtherReceivables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>31103 - Disclosure - Cash and Cash Equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCashAndCashEquivalentsTables</Role>
      <ShortName>Cash and Cash Equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureCashAndCashEquivalents</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>31203 - Disclosure - Shareholders??? Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureShareholdersEquityTables</Role>
      <ShortName>Shareholders??? Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>31303 - Disclosure - Non-current liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureNonCurrentLiabilitiesTables</Role>
      <ShortName>Non-current liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureNonCurrentLiabilities</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>31403 - Disclosure - Current Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCurrentLiabilitiesTables</Role>
      <ShortName>Current Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>31503 - Disclosure - Other income (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureOtherIncomeTables</Role>
      <ShortName>Other income (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureOtherIncome</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>31703 - Disclosure - Employee Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureEmployeeBenefitsTables</Role>
      <ShortName>Employee Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureEmployeeBenefits</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>31803 - Disclosure - Financial Income and Expense (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureFinancialIncomeAndExpenseTables</Role>
      <ShortName>Financial Income and Expense (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureFinancialIncomeAndExpense</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>31903 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>32003 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureEarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureEarningsPerShare</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>32103 - Disclosure - Leases (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureLeasesTables</Role>
      <ShortName>Leases (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureLeases</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>32303 - Disclosure - Related-Party Transactions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureRelatedPartyTransactionsTables</Role>
      <ShortName>Related-Party Transactions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureRelatedPartyTransactions</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>32403 - Disclosure - Auditor fees (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureAuditorFeesTables</Role>
      <ShortName>Auditor fees (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureAuditorFees</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>40101 - Disclosure - General Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureGeneralInformationDetails</Role>
      <ShortName>General Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureGeneralInformation</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>40201 - Disclosure - Basis of Preparation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureBasisOfPreparationDetails</Role>
      <ShortName>Basis of Preparation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureBasisOfPreparation</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>40302 - Disclosure - Significant Accounting Policies - Estimated useful lives (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSignificantAccountingPoliciesEstimatedUsefulLivesDetails</Role>
      <ShortName>Significant Accounting Policies - Estimated useful lives (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Financial Risk Management - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureFinancialRiskManagementNarrativeDetails</Role>
      <ShortName>Financial Risk Management - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Financial Risk Management - Undiscounted Liabilities by Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureFinancialRiskManagementUndiscountedLiabilitiesByMaturityDetails</Role>
      <ShortName>Financial Risk Management - Undiscounted Liabilities by Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Segment Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSegmentInformationDetails</Role>
      <ShortName>Segment Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureSegmentInformation</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Property, Plant and Equipment ('PP&amp;E') (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosurePropertyPlantAndEquipmentPpEDetails</Role>
      <ShortName>Property, Plant and Equipment ('PP&amp;E') (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosurePropertyPlantAndEquipmentPpETables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Investments in associates (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureInvestmentsInAssociatesDetails</Role>
      <ShortName>Investments in associates (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureInvestmentsInAssociatesTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Social Security and Other Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureSocialSecurityAndOtherTaxesDetails</Role>
      <ShortName>Social Security and Other Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureSocialSecurityAndOtherTaxesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Prepayments and Other Receivables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosurePrepaymentsAndOtherReceivablesDetails</Role>
      <ShortName>Prepayments and Other Receivables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosurePrepaymentsAndOtherReceivablesTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Cash and Cash Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCashAndCashEquivalentsDetails</Role>
      <ShortName>Cash and Cash Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureCashAndCashEquivalentsTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Shareholders??? equity - Share capital (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureShareholdersEquityShareCapitalDetails</Role>
      <ShortName>Shareholders??? equity - Share capital (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>41202 - Disclosure - Shareholders??? equity - Share options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureShareholdersEquityShareOptionsDetails</Role>
      <ShortName>Shareholders??? equity - Share options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>41203 - Disclosure - Shareholders??? Equity - Movements in the number of options outstanding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureShareholdersEquityMovementsInNumberOfOptionsOutstandingDetails</Role>
      <ShortName>Shareholders??? Equity - Movements in the number of options outstanding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Non-current liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureNonCurrentLiabilitiesDetails</Role>
      <ShortName>Non-current liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureNonCurrentLiabilitiesTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Current Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCurrentLiabilitiesDetails</Role>
      <ShortName>Current Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureCurrentLiabilitiesTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>41501 - Disclosure - Other income (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureOtherIncomeDetails</Role>
      <ShortName>Other income (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureOtherIncomeTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>41502 - Disclosure - Other income - Narrative (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureOtherIncomeNarrativeDetails</Role>
      <ShortName>Other income - Narrative (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>41601 - Disclosure - Research and development costs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureResearchAndDevelopmentCostsDetails</Role>
      <ShortName>Research and development costs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>41701 - Disclosure - Employee Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureEmployeeBenefitsDetails</Role>
      <ShortName>Employee Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureEmployeeBenefitsTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>41801 - Disclosure - Financial Income and Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureFinancialIncomeAndExpenseDetails</Role>
      <ShortName>Financial Income and Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureFinancialIncomeAndExpenseTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>41901 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureIncomeTaxesTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>42001 - Disclosure - Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureEarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureEarningsPerShareTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>42101 - Disclosure - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureLeasesDetails</Role>
      <ShortName>Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureLeasesTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>42201 - Disclosure - Commitments and Contingencies - Claims and Patent License Agreement (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCommitmentsAndContingenciesClaimsAndPatentLicenseAgreementDetails</Role>
      <ShortName>Commitments and Contingencies - Claims and Patent License Agreement (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>42202 - Disclosure - Commitments and Contingencies - Clinical support agreements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureCommitmentsAndContingenciesClinicalSupportAgreementsDetails</Role>
      <ShortName>Commitments and Contingencies - Clinical support agreements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>42301 - Disclosure - Related-Party Transactions - Compensation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureRelatedPartyTransactionsCompensationDetails</Role>
      <ShortName>Related-Party Transactions - Compensation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>42302 - Disclosure - Related-Party Transactions - Stock options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureRelatedPartyTransactionsStockOptionsDetails</Role>
      <ShortName>Related-Party Transactions - Stock options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="prqr-20191231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>42401 - Disclosure - Auditor fees (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.proqr.com/role/DisclosureAuditorFeesDetails</Role>
      <ShortName>Auditor fees (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.proqr.com/role/DisclosureAuditorFeesTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>prqr-20191231.xml</File>
    <File>prqr-20191231.xsd</File>
    <File>prqr-20191231_cal.xml</File>
    <File>prqr-20191231_def.xml</File>
    <File>prqr-20191231_lab.xml</File>
    <File>prqr-20191231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.ifrs.org/taxonomy/2019-03-27/ifrs-full</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
