A laryngeal mask that comprises a first element which is a rigid hollow tube essentially in the form of a "J", and which has a lengthwise opening along its entire length, and a second element that comprises a flexible tube, also essentially in the form of a "J", intended to be housed in the lengthwise opening of the first element, and which can be separated from it. This provides a configuration for a laryngeal mask that can change from having rigid properties to flexible ones at the doctors will, without the need to interrupt the patients supply of oxygen at any time.
