Seat device for vehicle

A armrest portion moving forward away from seat backs for allowing an object to be placed thereon is provided at the central portion of the seat backs of a rear row seat, and a movable cushion provided at a central portion of seat cushions in the vehicle width direction. The movable cushion is operative to move upward and forward away from the seat cushions to the location near a front end of the armrest portion. Accordingly, a large-scaled console can be formed at the proper level with the armrest portion and the movable cushion, thereby improving convenience.