Wire and method for manufacturing same

Provided is a method for manufacturing wire wherein a cylindrical outer layer body constituted of a magnetic metal containing iron and a core body having an outside diameter with a ratio to the insidediameter of the outer layer body of 85.1-99.4% are prepared, the inside surface of the outer layer body and the outside surface of the core body are mechanically polished, at least one of the insidesurface of the outer layer body and the outside surface of the core body is treated with hydrochloric acid, a base metal is obtained by disposing the core body inside the outer layer body, and the base metal is passed through a wire drawing die, thereby obtaining a wire having a core conductor that is formed by the core body and an outer layer that is formed by the outer layer body and covers thecore conductor.