To provide a stool with a circular seat which needs smaller storage room, is stored easily and in a stable condition without toppling when storing plural stools, has a beautiful design, and makes people feel comfortable when they sit on it.

This stool is provided with the circular seat 2 and more than three legs 3, which are placed under the bottom 21 of the circular seat 2 vertically. The circular seat 2 has protrusions 22, which stick out from more than three places of an outer edge 26. Each leg 3 is put downward from each of the protrusions 22.