Disclosed is a metal joint having improved electrical characteristics and mechanical strength. A center swaged part (2) formed by putting metal plates (11, 12) on top of each other, cutting the metal plates (11, 12) along a first to a fourth cut lines (L1 to L4), and depressing a part surrounded by the first to the fourth cut lines (L1 to L4). Metal joint parts are formed on cut surfaces of the first to the fourth cut lines (L1 to L4) because the cut surfaces of the first to forth cut lines (L1 to L4) are, while rubbing each other, depressed.