Seat device for a vehicle

There are provided a seatback 30 supporting backs of plural passengers seated on a bench type of seat cushion 20, a headrest 92 provided at an upper portion of a first portion 30a of the seatback 30 and supporting a head of the passenger seated in front of the first portion 30a, a pressure-receiving portion 60d provided at a second portion 30b of the seatback 30 which is arranged beside the first portion 30a so as to move rearwardly when being pressed by a rearward move of the passenger seated in front of the second portion 30b, and a headrest moving mechanism provided to connect the pressure-receiving portion 60d to the headrest 92 so that the headrest 92 is moved forwardly or upwardly in accordance with a rearward move of the pressure-receiving portion 60d. Accordingly, the passenger's head can be protected with a simple structure.