The invention relates to a vehicle seat. A support member (20) has a sheet-shaped body (20b) that expands and contracts and that supports a cushion, and a frame-shaped body (20a) that fixes the sheet-shaped body in a tensioned state. The sheet-shaped body (20b) is attached to a frame member (4F) by the frame-shaped body (20a) being engaged with the frame member (4F). The frame-shaped body (20a) is rigid and maintains a shape that follows an outer shape of the frame member (4F) when an occupant is seated, and has a first portion (41) where an end portion of the sheet-shaped body (20b) is fixed, and a second portion (42) where the end portion of the sheet-shaped body (20b)is not fixed. The second portion (42) is formed at a position that corresponds to a position where a load of the occupant concentrates when the occupant is seated.