To provide a binding method of which the purpose is to prevent scratch and deformation of binding matters such as a strip coil, and by which tension once applied to a metal band by an air motor can be retained even after welding of a metal band overlapped portion is completed and an electrode tip is retreated.

In the binding method to bind the metal band overlapped portion by spot welding, after the metal band 1 is wound around an outer periphery of an article to be bound and tightened, the electrode tip 4 for the spot welding is inserted between the metal band overlapped portion 2 and the article to be bound 6, welding is carried out inserting a pad 14 of which the thickness is equivalent to that of the electrode tip 4 around the electrode tip, only the electrode tip 4 is retreated after welding, and the article to be bound 6 is bound in a tightly binding manner by the metal band 1 with the pad 14 placed between the metal band overlapped portion 2 and the article to be bound 6.