Provided is a soldering method for soldering a tip end of an electric wire to a soldering portion of a metallic terminal which allows the soldering to be performed with excellent workability. The method includes a damming structure forming step forming a damming structure at a periphery of the soldering portion to dam a solder which is supplied in a molten state with a flux to the soldering portion to keep the solder at the soldering portion, an electric wire setting step setting the tip end of the electric wire at the soldering portion ready for soldering, and a solder supplying step supplying the solder in the molten state with the flux to the soldering portion to perform the soldering.