To supply water stably regardless of the condition of the workmanship of a stool made of pottery, and to spread water sufficiently onto the internal surface of a stool bowl even when a flushing device for the stool is used as simple flushing by installing a nozzle with a jet on the stool bowl side of a feed pipe inserted into the stool.

A feed water tank 2 is arranged to the upper section of the rear section of a stool 1, a feed pipe 4 supplying water from the feed water tank 2 to the inside of a stool bowl 3 for the stool 1 is inserted into the stool 1, and a nozzle 6 with a jet is mounted on the stool bowl 3 side of the feed pipe 4. Water is fed through the feed pipe 4 separated from the stool 1 from the feed water tank 2, and water is injected from the jet for the nozzle 6. Accordingly, water can be supplied stably regardless of the condition of the workmanship of the stool made of pottery, water can be spread sufficiently onto the internal surface of the stool bowl surely even when a flushing device for the stool is used for simple flushing, and stool flushing properties and sewage discharging properties can be improved.