US Patent 10093210 Vehicle seat

An automotive rear seat (1) includes a seat cushion (2) and a seat back (6). The seat back (6) includes a seat back main body portion (10) and a seat back side portion (20) disposed on one side of the seat back main body portion (10). The seat back side portion (20) is fixed to a vehicle body (body frame (FR)) or the seat cushion (2) via a first attachment portion (30) provided on a lower portion of the seat back side portion (20), and the seat back side portion (20) includes, at a position different from a position at which the first attachment portion (30) is provided, a rotation-restricting portion (40) configured to contact the vehicle body or the seat cushion (2) to restrict rotation of the seat back side portion (20).