Abstract: A seat for a van or the like including auxiliary seat structure pivotally mounted on seat back structure wherein the seat back structure and auxiliary seat structure are selectively movable into and out of a substantially vertical position with the auxiliary seat structure positioned behind the seat back structure and engaged with a floor to which the seat is secured at an angle to prevent pivotal movement of the seat back structure into a horizontal position and a substantially horizontal position wherein seat bottom structure, the seat back structure and the auxiliary seat structure are aligned in substantially the same horizontal plane. The seat back structure and auxiliary seat structure are automatically, releasably locked in the substantially vertical position thereof on movement of the seat back structure and auxiliary seat structure into the substantially vertical position thereof.