FILLING-BODY MANUFACTURING METHOD, PASSENGER-SEAT-CUSHION-MEMBER MANUFACTURING METHOD, AND FILLING BODY

A filling-body manufacturing method is a method of manufacturing a filling body that fills a hole part formed at a seat body and at least part of which is bonded to the seat body in a passenger-seat cushion member including the seat body and the filling body, the filling body being a porous structural body S made of flexible resin or rubber, the filling-body manufacturing method including a shaping step of shaping the filling body by using a 3D printer.