diff --git a/src/Mod/Sketcher/App/SketchObjectPy.xml b/src/Mod/Sketcher/App/SketchObjectPy.xml
index 85f6374987..3a3212aa3c 100644
--- a/src/Mod/Sketcher/App/SketchObjectPy.xml
+++ b/src/Mod/Sketcher/App/SketchObjectPy.xml
@@ -33,6 +33,11 @@
             <UserDocu>delete all the geometry objects and constraints from the sketch except external geometry</UserDocu>
         </Documentation>
     </Methode>
+    <Methode Name="deleteAllConstraints">
+        <Documentation>
+            <UserDocu>delete all the constraints from the sketch</UserDocu>
+        </Documentation>
+    </Methode>
     <Methode Name="toggleConstruction">
       <Documentation>
         <UserDocu>switch a geometry to a construction line</UserDocu>
diff --git a/src/Mod/Sketcher/App/SketchObjectPyImp.cpp b/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
index f2bbc34338..69678141bc 100644
--- a/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
+++ b/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
@@ -217,7 +217,7 @@ PyObject* SketchObjectPy::deleteAllGeometry(PyObject *args)
 {
     if (!PyArg_ParseTuple(args, ""))
         return 0;
-    
+
     if (this->getSketchObjectPtr()->deleteAllGeometry()) {
         std::stringstream str;
         str << "Unable to delete Geometry";
@@ -228,6 +228,20 @@ PyObject* SketchObjectPy::deleteAllGeometry(PyObject *args)
     Py_Return;
 }
 
+PyObject* SketchObjectPy::deleteAllConstraints(PyObject *args)
+{
+    if (!PyArg_ParseTuple(args, ""))
+        return 0;
+    
+    if (this->getSketchObjectPtr()->deleteAllConstraints()) {
+        std::stringstream str;
+        str << "Unable to delete Constraints";
+        PyErr_SetString(PyExc_ValueError, str.str().c_str());
+        return 0;
+    }
+
+    Py_Return;
+}
 
 
 PyObject* SketchObjectPy::toggleConstruction(PyObject *args)