A locking ring (1) for an ostomy coupling as well as an ostomy coupling is provided. The locking ring includes two extension arms (4,5) connected at a common fulcrum (6) that will act as a hinge, when the arms are rotated with respect to each other. A toggle-mechanism may be used in the locking ring. The extension arms will through a connection to the locking ring close the locking ring upon rotation.
