The invention is to provide a pressurized gas mist bathing system, ensuring hygiene and reduction in costs, by making only one part of the system disposable. This system comprises a gas supply means 10; a gas mist generating means 30 which has a portion connecting the gas supply means 10, a liquid storage of storing a liquid, a nozzle, a liquid suction pipe of sending the liquid to the tip of the nozzle, a collision member of colliding the liquid blown up by a gas stream from the nozzle therewith, a cylindrical gas inlet supplied with the gas and leading the gas till the upper portion of the nozzle, and a donut-shaped gas mist outlet collecting and discharging the gas mist around the periphery of the gas inlet; and a pressurized living organism bathing cover 50 for covering the skin and the mucous membrane of a living organism and formed with a space for sealing inside the gas mist from the gas mist generating means; and in the gas mist generating means 30, at least the liquid storage is displaceable and replaced by another, so that liquid storage is made disposable.