VEHICLE SEAT, AND SEAT FRAME FOR VEHICLE SEAT

Provided is a seat frame for a vehicle seat capable of supporting the back of a seated person during a rear-end collision by using a simple structure and few component portions. The present invention is a seat frame for a vehicle seat S. The seat frame includes a top frame portion 11a on the top of the seat, lateral frame portions on the right and left of the seat, and a connection frame 30 connecting the tops of the lateral frame portions so as to bridge them. The connection frame 30 includes a bent protrusion portion 37 bent in the longitudinal direction and arranged in a standing condition from a surface formed by the connection frame 30, at a position between a pair of the lateral frame portions. The bent protrusion portion 37 is provided over the entire length of the up and down direction of the connection frame 30.