diff --git a/src/main/java/info/bukova/isspst/services/users/DeleteUserException.java b/src/main/java/info/bukova/isspst/services/users/DeleteUserException.java
new file mode 100644
index 00000000..6b42026d
--- /dev/null
+++ b/src/main/java/info/bukova/isspst/services/users/DeleteUserException.java
@@ -0,0 +1,17 @@
+package info.bukova.isspst.services.users;
+
+import info.bukova.isspst.services.IsspstException;
+
+public class DeleteUserException extends IsspstException {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = -5326664758639660224L;
+	
+	public DeleteUserException(String message) {
+		super(message);
+		setReason(message);
+	}
+
+}
diff --git a/src/main/java/info/bukova/isspst/services/users/UserServiceImpl.java b/src/main/java/info/bukova/isspst/services/users/UserServiceImpl.java
index 470abf14..514b1978 100644
--- a/src/main/java/info/bukova/isspst/services/users/UserServiceImpl.java
+++ b/src/main/java/info/bukova/isspst/services/users/UserServiceImpl.java
@@ -9,6 +9,7 @@ import info.bukova.isspst.services.AbstractService;
 import info.bukova.isspst.services.StringXmlMarshaller;
 //import info.bukova.isspst.services.LazyLoader;
 
+import info.bukova.isspst.services.workgroups.WorkgroupService;
 
 import java.util.ArrayList;
 import java.util.HashSet;
@@ -35,6 +36,8 @@ public class UserServiceImpl extends AbstractService<User> implements UserServic
 	private PasswordEncoder encoder;
 	@Autowired
 	private RoleService roleService;
+	@Autowired
+	private WorkgroupService workgroupService;
 	private StringXmlMarshaller<UserSettingsData> marshaller;
 	private AuthMethod authMethod;
 	
@@ -216,4 +219,15 @@ public class UserServiceImpl extends AbstractService<User> implements UserServic
 		return authMethod;
 	}
 
+	@Override
+	public void delete(User entity) {
+		workgroupService.loadParents(entity);
+		
+		if (entity.getParents().isEmpty()) {
+			super.delete(entity);
+		} else {
+			throw new DeleteUserException("UserIsInWorkgroup"); 
+		}
+	}
+
 }
diff --git a/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupException.java b/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupException.java
index 6b588f38..accda6e8 100644
--- a/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupException.java
+++ b/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupException.java
@@ -13,9 +13,11 @@ public class WorkgroupException extends IsspstException {
 	public final static String MSUT_HAS_CENTER = "RoleMustHasCentre";
 	public final static String MUST_HAS_WORKGROUP = "WorkgroupMustHasCentre";
 	public final static String CYCLIC_MEMBER = "CyclicMembership";
+	public final static String HAS_PARENT = "WorkgroupIsInWorkgroup";
 	
 	public WorkgroupException(String message) {
 		super(message);
+		setReason(message);
 	}
 
 }
diff --git a/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupServiceImpl.java b/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupServiceImpl.java
index 5057396e..9b2c3a1d 100644
--- a/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupServiceImpl.java
+++ b/src/main/java/info/bukova/isspst/services/workgroups/WorkgroupServiceImpl.java
@@ -248,6 +248,11 @@ public class WorkgroupServiceImpl extends AbstractOwnedService<Workgroup> implem
 	@Transactional
 	@PreAuthorize("hasPermission(this, 'PERM_DELETE')")
 	public void delete(Workgroup entity) {
+		Workgroup dbWg = dao.getById(entity.getId());
+		if (!dbWg.getParents().isEmpty()) {
+			throw new WorkgroupException(WorkgroupException.HAS_PARENT);
+		}
+		
 		loadMembers(entity);
 		for (JobMapping m : entity.getMembers()) {
 			loadParents(m.getMember());
diff --git a/src/main/java/info/bukova/isspst/ui/ListViewModel.java b/src/main/java/info/bukova/isspst/ui/ListViewModel.java
index 0fb8b86d..9d5d4be8 100644
--- a/src/main/java/info/bukova/isspst/ui/ListViewModel.java
+++ b/src/main/java/info/bukova/isspst/ui/ListViewModel.java
@@ -3,6 +3,7 @@ package info.bukova.isspst.ui;
 import info.bukova.isspst.StringUtils;
 import info.bukova.isspst.data.DataModel;
 import info.bukova.isspst.filters.Filter;
+import info.bukova.isspst.services.IsspstException;
 import info.bukova.isspst.services.Service;
 
 import java.util.ArrayList;
@@ -202,6 +203,18 @@ public class ListViewModel<T extends DataModel> extends DocumentViewModel
 								BindUtils.postNotifyChange(null, null,
 										ListViewModel.this, "dataBean");
 								BindUtils.postGlobalCommand(null, null, "reloadRelated", null);
+							} catch (IsspstException e) {
+								if (e.getReason() != null) {
+									Messagebox.show(
+											StringUtils.localize(e.getReason()),
+											StringUtils.localize("Error"),
+											Messagebox.OK, Messagebox.ERROR);
+								} else {
+									Messagebox.show(
+											StringUtils.localize("DbSaveError"),
+											StringUtils.localize("Error"),
+											Messagebox.OK, Messagebox.ERROR);
+								}
 							} catch (DataIntegrityViolationException e) {
 								Messagebox.show(StringUtils.localize("DbCannotDelete"), StringUtils.localize("Error"), Messagebox.OK, Messagebox.ERROR);
 							} catch (AccessDeniedException e) {
diff --git a/src/main/webapp/WEB-INF/locales/zk-label.properties b/src/main/webapp/WEB-INF/locales/zk-label.properties
index eb050a4a..93457367 100644
--- a/src/main/webapp/WEB-INF/locales/zk-label.properties
+++ b/src/main/webapp/WEB-INF/locales/zk-label.properties
@@ -117,6 +117,7 @@ UsersGridColumnLogin=Login
 UsersGridColumnPersonalID=Osobní číslo
 UsersGridColumnFirstName=Jméno
 UsersGridColumnSureName=Příjmení
+UserIsInWorkgroup=Uživatele nelze smazat, protože je členem některé pracovní skupiny
 
 AgendaMaterial=Skupiny materiálu
 MaterialFormTitle=Skupina materiálu
@@ -354,3 +355,4 @@ WorkgroupFormMemberIsCenterMember=Některý ze členů přidávané komise je č
 WorkgroupFormCannotAddUser=Uživatele nelze přidat
 WorkgroupFormCannotAddWorkgroup=Komisi nelze přidat
 WorkgroupFormOrderLimit=Limit nákupů
+WorkgroupIsInWorkgroup=Komisi nelze smazat, protože je členem některého střediska