diff --git a/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java b/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java
index 5025b2cb8..db62d81af 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/pathmap/CreateForm.java
@@ -59,6 +59,9 @@ public class CreateForm {
     @ValidateTypeFailure
     public Long createdTime;
 
+    @Required
+    public String userAgent;
+
     public void initialize() {
         crudMode = CrudMode.CREATE;
         sortOrder = 0;
diff --git a/src/main/java/org/codelibs/fess/es/config/exentity/PathMapping.java b/src/main/java/org/codelibs/fess/es/config/exentity/PathMapping.java
index caaec1449..41fcc7c86 100644
--- a/src/main/java/org/codelibs/fess/es/config/exentity/PathMapping.java
+++ b/src/main/java/org/codelibs/fess/es/config/exentity/PathMapping.java
@@ -18,6 +18,7 @@ package org.codelibs.fess.es.config.exentity;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.es.config.bsentity.BsPathMapping;
 
 /**
@@ -29,6 +30,8 @@ public class PathMapping extends BsPathMapping {
 
     private Pattern regexPattern;
 
+    private Pattern userAgentPattern;
+
     public String getId() {
         return asDocMeta().id();
     }
@@ -52,10 +55,25 @@ public class PathMapping extends BsPathMapping {
         return regexPattern.matcher(input);
     }
 
+    public boolean hasUAMathcer() {
+        return StringUtil.isNotBlank(getUserAgent());
+    }
+
+    public Matcher getUAMatcher(final CharSequence input) {
+        if (!hasUAMathcer()) {
+            return null;
+        }
+
+        if (userAgentPattern == null) {
+            userAgentPattern = Pattern.compile(getUserAgent());
+        }
+        return userAgentPattern.matcher(input);
+    }
+
     @Override
     public String toString() {
         return "PathMapping [regexPattern=" + regexPattern + ", createdBy=" + createdBy + ", createdTime=" + createdTime + ", processType="
-                + processType + ", regex=" + regex + ", replacement=" + replacement + ", sortOrder=" + sortOrder + ", updatedBy="
-                + updatedBy + ", updatedTime=" + updatedTime + ", docMeta=" + docMeta + "]";
+                + processType + ", regex=" + regex + ", replacement=" + replacement + ", sortOrder=" + sortOrder + ", userAgent="
+                + userAgent + ", updatedBy=" + updatedBy + ", updatedTime=" + updatedTime + ", docMeta=" + docMeta + "]";
     }
 }
diff --git a/src/main/java/org/codelibs/fess/helper/PathMappingHelper.java b/src/main/java/org/codelibs/fess/helper/PathMappingHelper.java
index 8e25d45ad..0403f47df 100644
--- a/src/main/java/org/codelibs/fess/helper/PathMappingHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/PathMappingHelper.java
@@ -22,11 +22,14 @@ import java.util.Map;
 import java.util.regex.Matcher;
 
 import javax.annotation.PostConstruct;
+import javax.servlet.http.HttpServletRequest;
 
+import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.es.config.exbhv.PathMappingBhv;
 import org.codelibs.fess.es.config.exentity.PathMapping;
 import org.codelibs.fess.util.ComponentUtil;
+import org.lastaflute.web.util.LaRequestUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -95,7 +98,10 @@ public class PathMappingHelper {
         }
         String result = text;
         for (final PathMapping pathMapping : cachedPathMappingList) {
-            result = result.replaceAll("(\"[^\"]*)" + pathMapping.getRegex() + "([^\"]*\")", "$1" + pathMapping.getReplacement() + "$2");
+            if (matchUserAgent(pathMapping)) {
+                result =
+                        result.replaceAll("(\"[^\"]*)" + pathMapping.getRegex() + "([^\"]*\")", "$1" + pathMapping.getReplacement() + "$2");
+            }
         }
         return result;
     }
@@ -114,11 +120,42 @@ public class PathMappingHelper {
     private String replaceUrl(final List<PathMapping> pathMappingList, final String url) {
         String newUrl = url;
         for (final PathMapping pathMapping : pathMappingList) {
-            final Matcher matcher = pathMapping.getMatcher(newUrl);
-            if (matcher.find()) {
-                newUrl = matcher.replaceAll(pathMapping.getReplacement());
+            if (matchUserAgent(pathMapping)) {
+                final Matcher matcher = pathMapping.getMatcher(newUrl);
+                if (matcher.find()) {
+                    newUrl = matcher.replaceAll(pathMapping.getReplacement());
+                }
             }
         }
         return newUrl;
     }
+
+    private boolean matchUserAgent(final PathMapping pathMapping) {
+        if (!pathMapping.hasUAMathcer()) {
+            return true;
+        }
+
+        //TODO use OptionalThing
+        final HttpServletRequest request;
+        try {
+            request = LaRequestUtil.getRequest();
+        } catch (IllegalStateException e) {
+            //could not get request.
+            return false;
+        }
+        /*
+        final OptionalThing<HttpServletRequest> op = LaRequestUtil.getOptionalRequest();
+        if (!op.isPresent()) {
+            return false;
+        }
+        final HttpServletRequest request = op.get();
+        */
+
+        final String userAgent = request.getHeader("user-agent");
+        if (StringUtil.isBlank(userAgent)) {
+            return false;
+        }
+
+        return pathMapping.getUAMatcher(userAgent).find();
+    }
 }
diff --git a/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_details.jsp b/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_details.jsp
index 5a4fe2ec0..c47d88620 100644
--- a/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_details.jsp
+++ b/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_details.jsp
@@ -72,6 +72,10 @@
 												<th><la:message key="labels.sortOrder" /></th>
 												<td>${f:h(sortOrder)}<la:hidden property="sortOrder" /></td>
 											</tr>
+											<tr>
+												<th class="col-xs-2"><la:message key="labels.userAgent" /></th>
+												<td>${f:h(userAgent)}<la:hidden property="userAgent" /></td>
+											</tr>
 										</tbody>
 									</table>
 								</div>
diff --git a/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_edit.jsp b/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_edit.jsp
index 43a03d3ab..3a7397c9e 100644
--- a/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_edit.jsp
+++ b/src/main/webapp/WEB-INF/view/admin/pathmap/admin_pathmap_edit.jsp
@@ -88,6 +88,13 @@
 												min="0" max="100000">
 										</div>
 									</div>
+									<div class="form-group">
+										<label for="userAgent" class="col-sm-3 control-label"><la:message key="labels.userAgent" /></label>
+										<div class="col-sm-9">
+											<la:errors property="userAgent" />
+											<la:text property="userAgent" styleClass="form-control" />
+										</div>
+									</div>
 								</div>
 								<!-- /.box-body -->
 								<div class="box-footer">