To obtain a composition which can give a molding being delamination- free and not marked deteriorated in strengths by composting at least two resins with a wood flour in a specified ratio by heat melting.

70-40 pts.wt. at least two resins are composited with 30-60 pts.wt. wood flour be heat melting. The resins which can be desirably used are waste plastics. The resins are desirably modified or unmodified polyphenylene ether resins, acrylonitrile/butadiene/styrene resins, acrylonitrile/styrene resins and polystyrene resins. The wood flours used are exemplified by broken chips, pulps, wastes produced from a wood processing process and sawdust. Like conventional plastics, this composition can be used in the form of moldings. It is injection-molded into a house foundation packing or formed into a ceiling material for a bathroom by profile extrusion.