Electroconductive resin composite material for molding

A resin composite material consisting essentially of 100 parts by weight of polypropylene, from 10 to 50 parts by weight of a modified polypropylene, said modified polypropylene being polypropylene chemically modified with an organic unsaturated carboxylic acid of 3 to 10 carbon atoms or a copolymer of propylene and an organic unsaturated carboxylic acid of 3 to 10 carbon atoms, said modified polypropylene containing 0.5 to 8.0 mol% of said organic unsaturated carboxylic acid as carboxylic acid units, from 5 to 65 parts by weight of carbon fiber having a diameter of from 5 to 20 micrometers and a ratio of length to diameter of not less than 10 and from 5 to 65 parts by weight of electroconductive carbon black having a specific surface area of not less than 800 m.sup.2 /g.