The invention relates to a device intended for the treatment and/or alleviation of obstructive respiratory sleep disorders in patients and, in particular, for the activation and/or re-orientation the growth of the maxilla and the mandible in children. The device is characterised in that it comprises: a support for the patients body, including a chassis comprising a rest for the patients head, a seat and a support for the rib cage, all of which are mounted on the chassis such that, when the patient sits on the aforementioned support and positions his/her head against the headrest, the patients chest is inclined forwards at an angle α of less than 90° in relation to the vertical to the ground a mandible advancing device formed by an extra-oral means for anchoring to the mandible and/or an intra-oral means for anchoring to the mandible and/or a maxilla advancing device formed by an intra-oral means for anchoring to the maxilla and securing means for securing one or more elements to the headrest, said elements being provided to exert one or more pre-determined forces on the mandible and/or the maxilla by means of the mandible advancing device and/or the maxilla advancing device.La présente invention concerne un dispositif destiné au traitement et/ou au soulagement des troubles respiratoires obstructifs du sommeil dun patient, en particulier destiné à lactivation et/ou la réorientation de la croissance du maxillaire supérieur et de la mandibule chez lenfant qui se caractérise en ce quil comprend: - un support pour le corps dun patient dont le châssis comprend un appui pour la tête du patient, un siège et un support pour la cage thoracique lesquels sont montés sur le châssis de manière à ce que lorsque le patient prend place et sassoit sur ledit support et positionne sa tête contre lappui pour la tête, son buste soit maintenu incliné vers lavant selon un angle α,à la verticale au sol, inférieur à 90°, - un appareil davancée mandibulaire composé dun moyen extra-oral dancra
