A carbon dioxide gas mist pressure bath apparatus for preventing, improving or curing a myocardial infarction by contacting a carbon dioxide gas mist to a skin and a mucous membrane of a living organism directly or through a clothing, thereby to improve or promote a circulation of a blood, includes a carbon dioxide gas mist-enclosing unit for enclosing the living organism; a gas supply unit for supplying a carbon dioxide gas; a carbon dioxide gas mist generating and supplying unit for pulverizing and dissolving the carbon dioxide gas into a liquid, and supplying the carbon dioxide gas mist into the carbon dioxide gas mist-enclosing unit; an exhausting device for exhausting the gas in the carbon dioxide gas mist-enclosing unit to an outside thereof; and a control device for controlling a supplying amount of the carbon dioxide gas mist from the carbon dioxide gas mist generating and supplying unit.