PURPOSE: To take required actions such as the automatic opening of a toilet cover by detecting the body of a user before seating.

CONSTITUTION: A human body detecting sensor 10 is arranged at the front section of a toilet stool main body 1a. The height position of the human body detecting sensor 10 is preferably set near the floor surface below the toilet basin of the toilet stool main body 1a. When the approach of a user is detected by the human body detecting sensor 10, the human body detection signal is outputted, and the automatic opening of a toilet cover, the start, of a deodorizing device, and preliminary washing are conducted based on the signal.