VEHICLE SEAT

PROBLEM TO BE SOLVED: To provide a vehicle seat which has support members efficiently supporting areas near occupant's blade bones only at a necessary range and concurrently includes a lightweight breast part support part.SOLUTION: A vehicle seat includes: a seat back frame including a pair of left and right side frames; and a support member which is attached to an area between the side frames, supports an occupant from the rear side of the seat, and can deflect to the rear side of the seat when subjected to a load of the occupant. The support member includes a breast part support part which supports a breast part of the occupant, the breast part support part where both seat width direction ends are attached to the side frames. The breast part support part includes a pair of blade bone support parts 33, which supports a pair of blade bones 53 of the occupant from the rear side of the seat, at two positions sandwiching a seat width direction center. The blade bone support parts 33 protrude to the upper side of the seat relative to an upper end of the breast part support part in the seat width direction center.