A hyperbaric chamber comprises a flexible tubular housing (23) and at least one inflatable member (24), the at least one inflatable member (24), when inflated, configuring the housing into a chamber for the receipt of a person. A rigid container (10a, 10b) contains the chamber and, in a second configuration, is opened to support the configured chamber. In order to accommodate greater interior pressure without unduly increasing the tensile strength of the material of the housing, the tubular housing (23) may be formed by an inner housing (73) and an outer housing (74) with, in operation, a chamber (75) between the inner and outer housings (73, 74), the chamber (75), in use, being pressurised to a pressure intermediate the pressure of the patient-receiving chamber and the external ambient pressure. The chamber (15) may have an opening at at one end of the chamber, the opening being formed by a surround (43) and a closure (29) engaging the surround from the interior of the chamber so that the closure is pressed against the surround when the chamber is pressurised. The surround (43) and the closure (29) may have complimentary non-circular peripheral profiles such that the closure (29) can be orientated to pass through the surround (43) and then re-orientated to engage with the surround (43) from the interior of the chamber. Two chambers may be connected together end-to-end with a layer of material forming the housing being continuous from end-to-end of the connected chambers.Linvention concerne une chambre hyperbare qui comporte une enveloppe tubulaire souple (23) et au moins un élément gonflable (24), le ou les éléments gonflables (24), lorsquils sont gonflés, configurant lenveloppe en une chambre pour recevoir une personne. Un contenant rigide (10a, 10b) contient la chambre et, dans une deuxième configuration, est ouvert afin de porter la chambre configurée. Afin daccueillir une plus grande pression intérieure sans trop augmenter la résistance à la traction du matéria
