The invention relates to the technical field of plastic stools and in particular relates to a stool. The stool comprises a seat plate and supporting legs, wherein the seat plate comprises a flexible load-bearing surface and a supporting surface; the load-bearing surface is an equal thin body; the supporting surface is a non-equal thin body; the thickness of the load-bearing surface is equal to theminimum thickness of the supporting surface; a buffering structure is arranged below the load-bearing surface; each supporting leg comprises at least two supporting pieces, and the inner side edge ofone supporting piece is connected with the inner side edge of the other adjacent supporting piece to form the supporting leg with a cross section which is of an L-shaped structure; lateral supportingparts are arranged at outer side edges of the supporting pieces; any supporting piece, the lateral supporting part located on the supporting piece, and the other supporting piece adjacent to the supporting piece form a U-shaped supporting structure. According to the stool provided by the invention, the buffering structure is arranged, so that the impact on the stool is effectively alleviated whenpeople sit down, the feedback effect of a stool surface is reduced, and the comfort is improved; meanwhile, the cross section structure of each supporting leg is changed, and a stress deformation trend of the supporting pieces is changed, so that the whole supporting strength of the supporting legs is improved.