To provide an inexpensive and easy cutting-off structure of a passage which automatically cuts off a gas for pouring out a liquid, supplied in a container, ejecting to the outside of this liquid pouring device when the liquid in the container is consumed.

In a pouring device of draft beer, draft beer charged ion a barrel is extruded by carbon dioxide gas pressure. This device is provided with a chamber 11A vertically formed in the body 11, an inlet side horizontal passage 11B opened at the middle position of the inner wall face of the chamber 11A, an outlet side horizontal passage 11D opened at the inner wall face of the bottom of the chamber 11A, and a stopper ball 18 contained in the chamber 11A to have a larger diameter that the opening of the outlet side horizontal passage 11D and have a smaller specific gravity than the draft beer. When carbon dioxide gas is ejected from the barrel, the stopper ball 18 is positioned to closely contact the opening of the outlet side horizontal passage 11D by the gas pressure to cut off the passage.