Abstract: A folding stool has trapezoidal sides including front and rear nonfolding side walls and left and right folding end walls. Each end wall includes first and second nonfolding half-walls and a hinge connecting these half-walls to each other. The folding stool includes a nonfolding top wall connected to the top of the front side wall by a hinge and a strut connected proximate the middle of the top wall at one end and proximate the top of the rear side wall at the other end. The top wall extends horizontally outwardly from the left and right end walls and rear side wall when the folding stool is in its unfolded position to rest upon the left and right end walls and rear side wall to support weight placed upon the folding stool. The folding stool folds so that the top face of the top wall is coplanar with the outer face of the front side wall when in the folded position.