In accordance with the present invention a foldable plastic stool has many advantages. A foldable plastic stool is provided having the capacity to withstand greater seat loading than current chairs of similar configuration foldable plastic stool comprises three main sections of molded plastic, a front leg frame, a rear leg frame and a seat, which are interconnected.
The front leg frame and rear leg frame both span the lateral sides of the seat, with both leg frames including spaced left and right legs between which the seat is mounted. The front and rear leg frames are pivotally connected to one another near their upper ends.
The seat is pivotally supported by the front leg frame at a location approximately midway between the front and rear ends of the seat, and slidably engaged by the rear leg frame at the rear of the seat.
The opposite lateral sides of the seat include apertures which receive protrusions extending inwardly from the left and right legs of the front leg frame to pivotally support the seat at its midspan in the space between the left and right legs of the front leg pair.

The seat is supported near its rear end by sliding engagement of pins, extending from the opposite lateral sides of the seat near its rear, within guide channels provided on the inner legs of the rear leg frame. Upon reaching the horizontal seating position, the pins bear against the upper end of the guide channel to provide support to prevent further rotation of the seat.