A metal material is bent into a specified shape so as to respectively form a terminal part (2) in the vicinity of one end of a connector-use contact (1) and a contact part near the other end thereof.Then, a nickel-plated layer and a gold-plated layer as base plating are formed on the almost entire surface of the contact (1) including the terminal part (2) and the contact part. A laser beam (L) isapplied to a portion between the terminal part (2) and the contact part, especially a portion near the terminal part (2) to expose a base nickel-plated layer by removing the gold-plated layer, or toalloy gold in the gold-plated layer and the base nickel. Since nickel or an alloy of gold and nickel has a low wettability with solder, the diffusion of molten solder stops where it is melted.