Patent ID: 7506933

Claim:
A seat reclining device comprising: a spiral spring made of a wire and formed in a spiral shape including: a first engaged portion formed at one end of the spiral spring; and a second engaged portion formed at the other end of the spiral spring, wherein one of the first engaged portion and the second engaged portion engaging a seat cushion frame, and the other of the first engaged portion and the second engaged portion engaging a seat back frame, which is rotatably provided at the seat cushion frame; a first engaging member engaging the first engaged portion of the spiral spring; and a second engaging member engaging the second engaged portion of the spiral spring, wherein one of the first engaging member and the second engaging member, or each of the first engaging member and the second engaging member including: an extending direction supporting member supporting the first engaged portion and/or the second engaged portion, from a direction opposite an extending direction of the spiral spring; a first supporting member supporting at least one of the first engaged portion and the second engaged portion from outside in a normal direction of the spiral spring; and a second supporting member supporting the at least one of the first engaged portion and the second engaged portion from inside in a normal direction of the spiral spring, the second supporting member provided so as to be distanced at a predetermined distance from the first supporting member toward the opposite end side in an extending direction of the spiral spring.