Vehicle seat

A seat for a vehicle, includes: a seat cushion (17); a front support member (60) movably supporting the seat cushion (17) on a lower floor (21) of the vehicle; a seatback (18); a seatback support device (30) movably supporting the seatback (18) on an upper floor (22) located backward in the vehicle with respect to the lower floor (21); a dive down interlocking device (96) connected to the seat cushion (17) and the seatback (18), and adapted to move the seat cushion (17) toward the lower floor (21) when the seatback (18) is pivoted forward in the vehicle; and an operating device (45) provided on an upper portion of the seatback (18), and operatively connected to the dive down interlocking device (96).