Patent ID: 8579371

Claim:
A vehicle seat comprising: a reclinable seatback, a seat bottom movable in a front-and-rear direction, a first pretensioner for moving the seat bottom rearward in a vehicle collision, and left and right brackets attached to a vehicle body, wherein the seat bottom is attached to the brackets so as to move in the front-and-rear direction, the seatback is rotatably attached to the brackets, and the first pretensioner moves the seat bottom relatively rearward with respect to the brackets, wherein the first pretensioner comprises: one cylinder; a piston movable in the cylinder; an expansion chamber of the cylinder partitioned by the piston; and one energy means for supplying gas to the expansion chamber, wherein the first pretensioner is attached to the seat bottom, one of the cylinder and the piston is coupled with the left bracket through a first cable, the other of the cylinder and the piston is coupled with the right bracket through a second cable, and the cylinder and the piston are moved in an opposite direction from each other by gas energy from the energy means.