A single-core wire (4) formed by surrounding a single conductor (6) with a coating (7) and a stranded wire formed by twisting a plurality of strands (9) and surrounding them with a coating (10) (5) is a conductive wire (L), and the coating (7) is peeled off at one end of both ends in the length direction of the single-core wire (4) to expose the conductor (6). Has been. The exposed conductor (6) is formed with a crushed portion (8) that is crushed into a flat plate shape. The conducting wire (9) exposed at the end of the stranded wire (5) is joined by ultrasonic welding on the crushing portion (8).
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