The invention is to provide a gas mist pressure bath system, which is possible to control the amount of gas and liquid, pressure and others, and cause a gas mist to be absorbed through a skin and mucous membrane of a human living-body under an optimum condition, in which a mist is prepared by pulverizing and dissolving carbon dioxide or oxygen or a mixed gas of carbon dioxide and oxygen and a liquid at a density of not less than a predetermined value, and the thus prepared gas mist is directly contacted to the skin and mucous membrane of the living-body, the gas mist pressure bath system comprises a gas supply means 11, a liquid supply means 21, a gas mist supply means 31 for generating and supplying the gas mist prepared by blowing off gas supplied from the gas supply means into the liquid supplied from the liquid supply means 21, and the living body cover member 41 of covering the skin and mucous membrane of the living-body and forming a space of sealing the gas mist inside thereof, and the gas mist pressure bath system causes the gas mist within the living body cover member 41 to contact the skin and mucous membrane of the living-body at pressure of not less than a predetermined value.