VEHICLE AIR-CONDITIONING DUCT, AND RAILWAY VEHICLE

A car air-conditioning duct (13) guides air to a suction side of an air conditioner (12) mounted on a car (1) or guides the air flowing from a blow-off side of the air conditioner (12). The car air-conditioning duct (13) includes a duct wall (21) having a tubular shape and forming a duct outer surface (13c) and a duct inner surface (13b). The duct wall (21) is made of a composite foamed resin material containing polystyrene resin and polyolefin resin.