diff --git a/src/main/java/org/codelibs/fess/app/service/GroupService.java b/src/main/java/org/codelibs/fess/app/service/GroupService.java
index fa1e54573..aa34f23e6 100644
--- a/src/main/java/org/codelibs/fess/app/service/GroupService.java
+++ b/src/main/java/org/codelibs/fess/app/service/GroupService.java
@@ -106,9 +106,10 @@ public class GroupService implements Serializable {
 
     }
 
-    public List<Group> getAvailableGroupList() {
+    public List<Group> getAvailableGroupList(Integer size) {
         return groupBhv.selectList(cb -> {
             cb.query().matchAll();
+            cb.paging(size, 1);
         });
     }
 
diff --git a/src/main/java/org/codelibs/fess/app/service/RoleService.java b/src/main/java/org/codelibs/fess/app/service/RoleService.java
index 3483749cf..e44c39830 100644
--- a/src/main/java/org/codelibs/fess/app/service/RoleService.java
+++ b/src/main/java/org/codelibs/fess/app/service/RoleService.java
@@ -27,6 +27,7 @@ import org.codelibs.fess.app.pager.RolePager;
 import org.codelibs.fess.es.user.cbean.RoleCB;
 import org.codelibs.fess.es.user.exbhv.RoleBhv;
 import org.codelibs.fess.es.user.exentity.Role;
+import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.dbflute.cbean.result.PagingResultBean;
 import org.dbflute.optional.OptionalEntity;
 
@@ -37,6 +38,9 @@ public class RoleService implements Serializable {
     @Resource
     protected RoleBhv roleBhv;
 
+    @Resource
+    protected FessConfig fessConfig;
+
     public List<Role> getRoleList(final RolePager rolePager) {
 
         final PagingResultBean<Role> roleList = roleBhv.selectPage(cb -> {
@@ -106,9 +110,10 @@ public class RoleService implements Serializable {
 
     }
 
-    public List<Role> getAvailableRoleList() {
+    public List<Role> getAvailableRoleList(Integer size) {
         return roleBhv.selectList(cb -> {
             cb.query().matchAll();
+            cb.paging(size, 1);
         });
     }
 
diff --git a/src/main/java/org/codelibs/fess/app/web/admin/user/AdminUserAction.java b/src/main/java/org/codelibs/fess/app/web/admin/user/AdminUserAction.java
index 45a93d883..114993334 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/user/AdminUserAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/user/AdminUserAction.java
@@ -121,8 +121,8 @@ public class AdminUserAction extends FessAdminAction {
     }
 
     private void registerForms(final RenderData data) {
-        data.register("roleItems", roleService.getAvailableRoleList());
-        data.register("groupItems", groupService.getAvailableGroupList());
+        data.register("roleItems", roleService.getAvailableRoleList(fessConfig.getFormRoleListSizeAsInteger()));
+        data.register("groupItems", groupService.getAvailableGroupList(fessConfig.getFormGroupListSizeAsInteger()));
     }
 
     // ===================================================================================
diff --git a/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java b/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java
index 0180d92e2..b5a8fa638 100644
--- a/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java
@@ -37,6 +37,7 @@ import org.codelibs.fess.app.web.base.login.FessLoginAssist;
 import org.codelibs.fess.mylasta.action.FessHtmlPath;
 import org.codelibs.fess.mylasta.action.FessMessages;
 import org.codelibs.fess.mylasta.action.FessUserBean;
+import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.dbflute.hook.AccessContext;
 import org.dbflute.optional.OptionalThing;
 import org.lastaflute.db.dbflute.accesscontext.AccessContextArranger;
@@ -71,6 +72,9 @@ public abstract class FessBaseAction extends TypicalAction // has several interf
     @Resource
     protected SessionManager sessionManager;
 
+    @Resource
+    protected FessConfig fessConfig;
+
     // ===================================================================================
     //                                                                               Hook
     //                                                                              ======
diff --git a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
index 7764c8cc7..1b53393a9 100644
--- a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
+++ b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
@@ -25,6 +25,12 @@ public interface FessConfig extends FessEnv {
     /** The key of the configuration. e.g. Fess */
     String DOMAIN_TITLE = "domain.title";
 
+    /** The key of the configuration. e.g. 100 */
+    String FORM_ROLE_LIST_SIZE = "form.role.list.size";
+
+    /** The key of the configuration. e.g. 100 */
+    String FORM_GROUP_LIST_SIZE = "form.group.list.size";
+
     /** The key of the configuration. e.g. admin */
     String AUTHENTICATION_ADMIN_ROLES = "authentication.admin.roles";
 
@@ -79,6 +85,36 @@ public interface FessConfig extends FessEnv {
      */
     String getDomainTitle();
 
+    /**
+     * Get the value for the key 'form.role.list.size'. <br>
+     * The value is, e.g. 100 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     */
+    String getFormRoleListSize();
+
+    /**
+     * Get the value for the key 'form.role.list.size' as {@link Integer}. <br>
+     * The value is, e.g. 100 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     * @throws NumberFormatException When the property is not integer.
+     */
+    Integer getFormRoleListSizeAsInteger();
+
+    /**
+     * Get the value for the key 'form.group.list.size'. <br>
+     * The value is, e.g. 100 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     */
+    String getFormGroupListSize();
+
+    /**
+     * Get the value for the key 'form.group.list.size' as {@link Integer}. <br>
+     * The value is, e.g. 100 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     * @throws NumberFormatException When the property is not integer.
+     */
+    Integer getFormGroupListSizeAsInteger();
+
     /**
      * Get the value for the key 'authentication.admin.roles'. <br>
      * The value is, e.g. admin <br>
@@ -215,6 +251,22 @@ public interface FessConfig extends FessEnv {
             return get(FessConfig.DOMAIN_TITLE);
         }
 
+        public String getFormRoleListSize() {
+            return get(FessConfig.FORM_ROLE_LIST_SIZE);
+        }
+
+        public Integer getFormRoleListSizeAsInteger() {
+            return getAsInteger(FessConfig.FORM_ROLE_LIST_SIZE);
+        }
+
+        public String getFormGroupListSize() {
+            return get(FessConfig.FORM_GROUP_LIST_SIZE);
+        }
+
+        public Integer getFormGroupListSizeAsInteger() {
+            return getAsInteger(FessConfig.FORM_GROUP_LIST_SIZE);
+        }
+
         public String getAuthenticationAdminRoles() {
             return get(FessConfig.AUTHENTICATION_ADMIN_ROLES);
         }
diff --git a/src/main/resources/fess_config.properties b/src/main/resources/fess_config.properties
index feec28f2a..e0e3a254d 100644
--- a/src/main/resources/fess_config.properties
+++ b/src/main/resources/fess_config.properties
@@ -10,8 +10,10 @@ domain.title = Fess
 
 
 # ========================================================================================
-#                                                                                      DB
+#                                                                                      ES
 #                                                                                     ====
+form.role.list.size = 100
+form.group.list.size = 100
 
 
 # ========================================================================================