A device for fastening a safety module on a steering wheel frame includes at least one resilient ring, at least one hook and at least one valve gridge. The at least one hook includes a first surface forming a guide track ending on an inflection point, and a second surface separated from the first surface by the inflection point. The at least one valve bridge has with a third surface across from the second surface of the hook. The resilient ring locks the module fixed on the frame by bearing on the second surface of the hook and on the third surface of the valve bridge. The third surface of the valve bridge includes at least one recess arranged across from the inflection point.