To provide a pneumatic pressure extrusion type liquid vessel which pushes out a liquid such as a shampoo or the like from the inside of the vessel by use of pneumatic pressure.

A discharge hole (11) is mounted on the outer surface of the container (1) and a pipe (9) is mounted in the vessel(1). An intake hole (10) is mounted at the lower tip end of the pipe and the upper side tip end is connected to the discharge hole (11). A flow-out preventing valve (12) is mounted in the discharge hole (11) and a round nozzle (2) is attached thereto. An elastic flexible portion (4) is mounted in the upper portion of the vessel (1). A hand-pushing plate (5) is mounted on the upper portion of the flexible portion (4). A pouring inlet (8) is mounted at the upper portion of the hand-pushing plate (5) and is covered with a cap (7) with a valve mechanism and a cap (6). A spindle (15), a non-return valve (16) and an inner side air hole (17) are mounted in the cap (7) with the valve mechanism. It is a characteristic that a space is formed between the cap with the valve (7) mechanism and the cap (6) and an outer side air hole (18) is mounted.