The invention to provide a gas mist pressure bath system which is possible to control the amounts, pressures and others of gas and liquid, and cause the gas mist to be absorbed through the skin and mucous membrane of a human living organism under an optimum condition. This system is for preparing a mist (gas mist) by pulverizing and dissolving a gas (carbon dioxide or oxygen, otherwise a mixed gas) and a liquid at a density of not less than a predetermined value, and contacting the mist to the skin and mucous membrane of a living organism. The system comprises a first gas supply means 11 for generating the gas mist, a second gas supply means 12 for dissolving the gas in the liquid, a liquid supply means 21, a gas mist supply means 31 for pressure-supplying the gas mist, and a covering member 41 for covering the skin and mucous membrane and forming a space for sealing inside the gas mist supplied from the gas mist supply means 31, contacting the gas mist within the living organism covering member 41 to the skin and mucous membrane at pressure of not less than a predetermined value.