PURPOSE: To improve melt-sticking resisting properties to a stock to be welded and the thermal-fatigue resisting properties, by forming the coated layer of carbonate, nitrate, carboboride, nitride-boride, and mutual solid solutions of them of the metals of 4a, 5a, 6a groups in the table of periodic law, on the surface of Cu or Cu alloy.

CONSTITUTION: A pure copper or a copper alloy containing Cd, Ag, Ni, Cr, Be, etc. is used for the substrate of a coating material. Among the compounds of 4a, 5a, 6a groups of a coated layer, the material of nitrate of titanium and tantalum containing by molar percent, 70W99.5% N, 0.5W30% O, 98.5W99.9% Ti, 0.1W1.5% Ta, is most desirable in its properties, and the thickness of coated layer of 0.5W3μm is suitable. The coated layer is formed by chemical or mechanical vapor deposition method. In this way, an electrode member for welding excellent in the melt-sticking resisting properties to a stock to be welded and the thermal fatigue resisting properties, is obtained.