PURPOSE: To prevent conductive filler from peeling off from tone surface of a shield case which is formed by injection molding of plastic material containing the conductive filler by coating the surface of the shield case with a thermo plastic resin film.

CONSTITUTION: A shield case A is made by coating a thermoplastic resin film 2 on the surface of a main body l which is formed by injection molding of plastic material. In the main body l of the case, conductive filler is contained in such quantity as to be in accordance with the rate at which the conductive filler is contained in the plastic material. The main body 1 of the case is pro vided with almost a uniform conductivity by fibers of the conductive filler 3 which are intertwined with each other. Consequently, the shield case fully exhibits the shielding effect against a radioactive noise.