Foldable vehicle seat

A foldable vehicle seat is constructed such that when the seat is placed in a passenger area and that a seat cushion is tipped up from a seating position (P1), a forward-inclination stopper (20) stops once the seat cushion at an upright position (P3) by abutting on a lock plate (23). When the seat is moved from the passenger area to a luggage area, the forward-inclination stopper (20) allows inclination of the seat cushion to the most forward inclined position (P2) in accordance with a position of the lock plate (23).