Thus far, it has not been possible to produce laryngeal masks having a supraglottic tube as a one-piece unit. If the supraglottic tube (2) is provided with three lumens (4, 5, 6), the center one (6) of which has no passage to the respiration space (10), a solution is proposed. What is proposed is that the center guide lumen is provided with a longitudinal slit (8) extending from the distal end (9) to the laryngeal mask head (3). A connecting web can be attached between two cores or sliders forming the lumens, generating the desired stability in order to maintain the pressing power tool state without deformation.