Vehicle seat

A vehicle seat, comprising:

• a seatback frame which has side frame sections on both sides thereof in a seat width direction, each of the side frame sections having a side wall that faces laterally outwardly in the seat width direction;
• a load transmission member which projects laterally outwardly in the seat width direction from one of the side frame sections and transmits an impact load input from a side of a vehicle body to the seatback frame, the load transmission member having a surface that faces a vehicle front side, and projecting from the side frame section such that a corner is defined between the side wall of said one of the side frame sections from which the load transmission member projects and the surface of the load transmission member that faces a vehicle front side;
• and
• a side airbag device which is provided with an inflator which generates gas when the impact load is input, and a folded bag body to be deployed when the pressure of the gas is received,
• wherein the inflator is attached to the side wall of said one of the side frame sections at a position that is laterally outward from the side wall of said one of the side frame sections and forward from the surface of the load transmission member that faces the vehicle front side in a seat front-back direction, so that the inflator is disposed at said corner to oppose the side wall of said one of the side frame sections and the surface of the load transmission member that faces the vehicle front side, and
• the bag body is disposed at a position which is laterally outward from a gas discharge port of the inflator in the seat width direction, and at a position that is forward from the surface of the load transmission member that faces the vehicle front side in the seat front-back direction, so that the bag body opposes the second surface of the load transmission member.