PURPOSE: To clean a toilet stool with a small amount of water by forming a flush toilet for vehicle out of a conveying pump for sending cleaning water of the amount specified each time to the toilet stool, and of a cleaning nozzle for injecting the cleaning water from a cleaning water tank at a high speed.

CONSTITUTION: A detection sensor 8 for occupation, of such as a micro-switch which is actuated ON when a user is seated on the lower side of a closet seat 7, is provided, and a first signal is transmitted to a controller 19, while a cleaning water of 0.2-2.0l is injected into a toilet stool 1 through the injection port of a cleaning nozzle part 2 at a high speed, by the actuation of a conveying pump. When the user is separated from the closet seat 7, a second signal is input to the controller 19, and the conveying pump 18 is actuated for a preset period of time. In the case of a urinal, when a lid 3 of the toilet stool 1 is lifted up, An ON actuation signal of a detection sensor 6 for occupation, of such as a micro-switch which is actuated ON by being pressed by a lever 5, is input to the controller 19, and the cleaning water is injected for a preset period of time. The toilet stool can thus be cleaned with a small amount of cleaning water.