To achieve weight reduction, and sufficiently improve connection strength and energization performance of a connector.

A caulked part 6 of the connector body 2 which by bending and caulking a leg part 5, includes a butt joint part 9 to butt its side end faces 5a, and is formed to pinch and fix an aluminum-made wire 8 in its interior, since a joining part 7 is formed by integrally solid-phase joining the caulked part 6 and the wire 8 along the joint part 9 of the caulked part 6 by friction stir joining, in addition to that the connector body and the wire are not extracted even if heat is generated by energization, an energized area of the connector body and the wire is expanded, and the energization performance is improved.