VEHICLE SEAT

In a vehicle seat, a side frame (38) of a seat back frame (25) has a front wall (38b) that is formed so as to be bent inward continuously from a front edge of a plate-shaped portion (38a) and forms a curved region (41) extending vertically from around the rotating shaft and reaching an upper frame (39), and a rear wall (38c) that is formed so as to be bent inward continuously from a rear edge of the plate-shaped portion (38a) and forms a curved region (42) extending vertically from around the rotating shaft and reaching the upper frame (39), and an inner edge of the front wall (38b) has a projecting piece (69) that spreads to the inside from a virtual outline (68) corresponding to a shape of the upper frame (39) and is superimposed on the front wall (54) of the upper frame (39) from the rear. This provides a vehicle seat that can contribute to improvement of the work efficiency when assembling a seat back frame.