VEHICLE SEAT

In a vehicle seat, a side frame of a seat back frame has a front wall that is formed so as to be bent inward continuously from a front edge of a plate-shaped portion and forms a curved region extending vertically from around the rotating shaft and reaching an upper frame, and a rear wall that is formed so as to be bent inward continuously from a rear edge of the plate-shaped portion and forms a curved region extending vertically from around the rotating shaft and reaching the upper frame, and an inner edge of the front wall has a projecting piece that spreads to the inside from a virtual outline corresponding to a shape of the upper frame and is superimposed on the front wall of the upper frame from the rear. This provides a vehicle seat that can contribute to improvement of the work efficiency when assembling a seat back frame.