POROUS STRUCTURAL BODY, POROUS STRUCTURAL BODY MANUFACTURING METHOD, AND PASSENGER-SEAT CUSHION MEMBER

A porous structural body is made of flexible resin or rubber and includes a skeleton part that defines a plurality of cell holes C, and a top skin part that is formed on at least part of an outer side of the skeleton part and integrated with the skeleton part and at least part of an outer side of the top skin part is a surface.