PURPOSE: To prevent a mesh-like metallic band from fraying, and also to elevate its mechanical strength, by forming a molten zone in the vicinity of the end part of the metallic band by a narrowed plasma arc, and cutting it in the molten zone.

CONSTITUTION: A gap between a plasma arc torch and a metallic band 1 is adjusted, and inert gas is made to flow to passages between a cathode rod 4 and an inside nozzle 5 and between the inside nozzle 5 and an outside nozzle 6. Subsequently, a switch 8 is closed, and by an electric power source 7, a plasma arc A having high energy density, which has been narrowed by a narrowing port 5a of the inside nozzle 5 is formed between the cathode rod 4 and the metallic band 1. Subsequently, the plasma arc torch is moved along a slit 3a of holding metallic fittings 3, molten zones 1a, 1a' of several millimeters in width are formed in the vicinity of both ends of the metallic band 1, it is cut in the molten zones 1a, 1a', its terminals are removed, and stop metallic fittings are attached to both end parts.