To shorten energization time for keeping a toilet seat warm to reduce power consumption for saving energy without giving uncomfortableness to a user.

This stool device comprises a stool 83, a toilet seat 81 shaft- supported on a toilet seat rotary shaft 30 placed on the stool 83, a toilet seat heat generation heater H to keep the toilet seat 81 warm, and a toilet cover 82 shaft-supported on a toilet cover rotary shaft to the toilet seat 81, and on the back side of the toilet cover 82, a front wall 823, a first side wall 821, and a second side wall 822 are integrally provided to stand on an outer circumference of the toilet cover 82, and a shielding member 825 is provided to stand. A heat insulating space part 820 surrounded by the front wall 823, the first side wall 821, the second side wall 822, and the shielding member 825 is thus formed.