The invention comprises filling a conductive adhesive on a hole end of a wire connection part in tubular shape of the terminal which has an electric contact part at one side and the wire connection part at the other side, inserting an electric wire from a hole opening of the wire connection part toward the hole end, and reducing evenly a size of a tubular wall of the wire connection part, thereby causing the conductive adhesive to infiltrate into a space of the electric contact part or between wires. The invention also comprises tightening the tubular wall of the wire connection part by a rotary swaging process. Further, the conductive adhesive is a nickel paste which is a mixture of nickel powders in a liquid epoxy resin based binder. In addition, at least one of a core wire portion of the electric wire or the terminal is aluminum or aluminum alloy.