A cover for gas mist pressure bath includes a living-body cover member having an extension part extending from substantially center part of the living-body cover member, an adhesive part adhering the cover member to the skin and the mucous membrane of the living-body, a gas mist supply port for introducing the gas mist into the cover member for gas mist pressure bath, an outlet for exhausting air, the gas mist or the mixed gas sealed in the cover member for the gas mist pressure bath and controlling amounts of the gas, a fixing member fixing the cover member on the living-body, including a pair of belts extending from an edge of the adhesive part and a pair of belt stoppers adjusting the pair of belts, and a constricting ring pressurizing an inside of the living-body cover member to carry out pressurization.
