PURPOSE: To obtain a method for improving the conductivity of a resin molding to thereby give it characteristics suitable for electrostatic coating by mixing a specific nitrogen compd. into the resin material for the molding, molding the resin material, and subjecting the surface of the resulting molding to a corona discharge treatment.

CONSTITUTION: A material for a resin molding is mixed with a nitrogen compd. represented by the formula: R1-Y [wherein R1 is a 5-21C alkyl or alkenyl; and Y is a group represented by formula I or II (wherein R2 is H or a group represented by formula III; R3 is a group of formula IV or V; R4 is H a 1-4C alkyl; R5 is CH3 or CH2CH2)H; and n is 0-20)] and molded. Then, the surface of the resulting molding is subjected to a corona discharge treatment. The nitrogen compd., examples being an aliph. alkanolamide compd. and an amine oxide compd., is used usually in an amt. of 0.01-10wt.% of the material. Thus obtd. molding can be electrostatically coated by spraying and depositing a statically charged coating material.