A wire is arranged on a base and pushed to the base with tips. Then, the tips are welded to the base while pushing the tips to the base, thereby to fix the wire to the base and conduct a wiring of the wire on the base in order. Firstly, these wire arranging process and tip welding process are applied to a wiring starting point of the wire, and then the next wire arranging process and tip welding process are applied to the next fixing point of the wire in order.