To reduce an amount of rear protrusion of a vehicle seat equipped with an airbag module configured to deploy rearward, in a vehicle seat (1) provided with a seat cushion (3) and a seat back (4), the seat back includes: a seat back frame (7) including a pair of left and right side frames (11) extending in a vertical direction and an upper frame (12) connecting upper ends of the side frames to each other; an airbag module (43) supported by an upper half of the seat back frame via a bracket (31); and a skin member (9) covering the seat back frame, the bracket, and the airbag module from a rear side thereof, wherein a part of the skin member corresponding to the airbag module is provided with a frangible portion (80) configured to open upon inflation of an airbag (45).