SEAT BACK

A seat back includes a back board serving as a decorative plate on a rear side of the seat back, a back frame that is configured to support a seated person, a back pad that is disposed at a front side the back frame, is configured to supports the seated person, and has elasticity, an intermediate board that is interposed between a peripheral edge of the back pad and a peripheral edge of the back board, and a back cover that is disposed over the back pad and the intermediate board.