Abstract: A ballast exhaust pipe closing appliance for a ship is so designed that a closing stopper comprising an inflatable bag body is inserted in a ballast exhaust pipe. By supplying compressed air in the closing stopper, the closing stopper is inflated and closes the ballast exhaust pipe, thereby preventing liquid which leaked in the ballast exhaust pipe from flowing into the sea. Also, the closing stopper can be removed automatically and fluid which leaked in the ballast exhaust pipe can be drawn out by exhausting compressed air in the closing stopper and by raising the air pressure in the ballast exhaust pipe.