Abstract: A vehicle seat which includes: a seat back for supporting on a front side thereof a back of a driver/passenger seated in the vehicle seat, the seat back having an upper portion for supporting an upper portion of the driver's/passenger's back; a headrest provided on top of the seat back for supporting a head of the driver/passenger; a headrest forward moving device which forces the headrest to move forward relative to the seat back when a backward force acts on the front side of the seat back; and a seat back upper portion push-out device which pushes the upper portion of the seat back forward concurrently with the forward movement of the headrest.

Abstract: An active headrest structure that can be disposed without damaging the board member on the back surface of the seat back is provided. On the back surface of seat back 18 is provided backboard 20, which is approximately a board shape and disposed apart from arm member 4 in the front to rear direction of the vehicle. Top portion 20b of backboard member 20 and arm member 4 are connected by spring member 23 as the elastic member.