A device for pressure bathing in a gas-containing mist is provided which enables carbon dioxide gas, oxygen, or a gaseous mixture of carbon dioxide gas and oxygen to be brought into contact with the skin or mucous membrane of the head of a living body at a pressure not lower than a given value and be efficiently absorbed percutaneously. The device is for bringing oxygen, carbon dioxide gas, or a gaseous mixture of oxygen and carbon dioxide gas each having a concentration not lower than a given value into contact with the skin or mucous membrane of the head of a living body. The device comprises: a gas-containing mist generator (11) which forms a mist from a gas and a liquid through atomization/dissolution and supplies the mist a compressed-air feeder (12) which supplies compressed air and a living-body-masking member (13) which has a shape suitable for covering the head of the living body and has been connected to the gas-containing mist generator (11) and the compressed-air feeder (12), the masking member (13) having a first closed layer (14) in which the gas-containing mist supplied from the gas-containing mist generator (11) is enclosed and a second closed layer (15) in which the compressed air supplied from the compressed-air feeder (12) is enclosed. With the second closed layer (15), the gas-containing mist is brought into contact with the skin or mucous membrane of the living-body head at a pressure not lower than a given value.Linvention concerne un dispositif pour bain sous pression dans un brouillard contenant un gaz qui permet de mettre du dioxyde de carbone gazeux, de loxygène ou un mélange gazeux de dioxyde de carbone gazeux et doxygène en contact avec la peau ou la membrane muqueuse de la tête dun organisme vivant à une pression qui nest pas inférieure à une valeur donnée, et qui permet une absorption efficace par voie percutanée. Le dispositif sert à amener de loxygène, du dioxyde de carbone gazeux, ou un mélange gazeux doxygène et de dioxyde de car
