PURPOSE: To facilitate the connection and the realize secure connection by inserting the enamel wire being led out from a coil body into a connection pipe, and calking the connection pipe, and mechanically force-bonding the enamel wire with an outer lead wire, and also soldering the end face of the enamel wire with the outer lead wire.

CONSTITUTION: An enamel wire 1 and an outer lead wire 3 are made to abut on each other, and the tops of the lines 1 and 3 are inserted in a metallic tubular connection pipe 6. And the pipe 6 is pressed to calk itself thus a small diameter part 7 is made, and the line 1 and a strand 5 are force-bonded inside the small diameter part 7. In this force-bonding, stress is also added to the insulating film of the wire 1, and one part of the insulating film is exfoliated by flaws, etc., and electrical connection becomes favorable. Furthermore, soldering 8 is done inside the top of the connection pipe 6. Hereby, the connection becomes easy, and secure connection can be done.