A vehicle seat frame is provided, wherein the back center frame of the seat back frame is of hollow, quadrangular prism shape. The connecting member includes a cylindrical outer cylinder portion, a ceiling portion projecting inwardly from one axial end of the outer cylinder portion and a flange portion projecting outwardly from the other axial end of the outer cylinder portion. The ceiling portion of the connecting member is fixed to an inner surface of one of the side plate portions of the back center frame and a surface of the outer cylinder portion side of the flange portion is fixed to an outer surface of the other of the side plate portions of the back center frame, and the other surface opposite to the surface of the outer cylinder portion side of the flange portion is connected to the bracket through the recliner.