To provide a closet seat easy to change hardness of a seat surface of the closet seat and able to heat or cool the seat surface.

The closet seat is provided with an air bag 1, a pressurizing/ depressurizing apparatus 2, a bathroom entering detecting part 3 for transmitting a bathroom entering detecting signal, an air bag pressure detecting part 5 for detecting an air bag pressure when an occupant is seated himself or herself on the closet seat and for transmitting an air bag pressure signal, a seat surface temperature detecting part 8 for outputting a seat surface temperature detecting signal and a room temperature detecting part 7 for outputting a bathroom temperature detecting signal. An air bag pressure controlling part 6 outputs a pressure control signal to the pressurizing/depressurizing apparatus 2 by receiving the bathroom entering detecting signal and also outputs a pressure control signal to the same by receiving the air bag pressure signal. Temperature of air supplied to the air bag is regulated by receiving the seat surface temperature detecting signal and the room temperature detecting signal.