A carbon dioxide administering apparatus to administer carbon dioxide to a part of the human skin that has an almost sealed Space (210) in which legs can be placed, Solvent tank (8) that reserves vaporable Solvent (8) in which carbon dioxide dissolves at the bottom of Space (210), Heating part (22) that heats up Solvent (8) in Solvent tank (23) to vaporize, Carbon dioxide supplying part (24) that supplies carbon dioxide into Space (210) above Solvent tank (23), and Adhesion part (25), to which floating droplets produced from Solvent (8) in Solvent tank (23) adhere, placed in Space (210) above Solvent tank (23). Legs can be placed in Space (210) above Adhesion part (25).