The protector (10) has a jaw part (20), and a tongue part (50) for holding down tongue of a patient, where the tongue part is connected with the jaw part. The jaw part comprises an opening (22) for visual inspection of tongue position of the patient. The jaw part is formed in toothed arc-shape, where caudal edge of the jaw part is split by a gap (24) extending from the opening. Connection between the jaw part and the tongue part is detachable, where the detachable connection is formed according to kind of a cavity positive part system.
