Abstract: A collapsible angle piece for dental or surgical use has a head part, an elbow part detachably connected to the head part, and a handle detachably connected to the elbow part remote from the head part and having an actuating surface. The elbow part has a cage that is axially moveable between a locking position and a release position. At least one locking element is radially moveably supported in the cage, wherein the at least one locking element can be in a radially inner position or a radially outer position depending on whether the cage is in the locking position or in the release position. At least one elongate actuating member is arranged in the elbow part so as to be substantially axially moveable, wherein the at least one elongate actuating member has a first end cooperating with the cage and a second end cooperating with the actuating surface of the handle.