To provide an economical pressurization liquid pumping out device, which is light, by which the containing capacity for a liquid agent can be in creased, for which external energy is not required, and of which operation is extremely simple and less laborious.

The pressurization liquid pumping out device comprises a pressure container for storing the liquid agent, an air pump for supplying the pressure container with pressurized air, and a liquid pumping out pipe for pumping out the liquid agent from the pressure container. In the air pump, a top plate and a bottom plate each coupled to the upper end and the lower end of a flexible bellows body, both the plate having stiffness, is coupled so that the bellows body can extend or contract upward or downward, respectively, by a hinge with a latitudinal shaft, wherein the top plate has a check valve for allowing the external air to flow into the bellows body, another check valve for allowing the air in the bellows body to flow out to an airpipe, both valves being within the top plate, and a footwear attachment means which is on the top plate.