PURPOSE: To provide a high surface insulating characteristic and to enable conductive joint treatment by soldering in an optional part by adhering and laminating an electrical insulating sheet via a flux layer for soldering to at least one surface of a thin metallic sheet or foil having high electrical conductivity.

CONSTITUTION: An electrical insulating sheet 11 is laminated via an adhesive layer 12 on one surface of a thin metallic sheet or foil 13 having high electrical conductivity and an electrical insulating sheet 15 is laminated via a flux layer 14 to the other surface thereby constituting an electromagnetic wave shielding material. The sheet 15 of the electromagnetic wave shielding material is partly stripped to expose the layer 14 and the exposed part is joinable by soldering to the other metallic material.