To exchange only the part of thin bristles, to narrow the tip of the thin bristles and to facilitate a fine hair dyeing operation at a hairline or the like.

The thin bristles 4 of a synthetic resin integrally molded article composed of a base part 10 and a thin bristle part 11 is prepared as a component different from a handle 2 and they are assembled by the structure of mutually fitting the base part 10 and the handle 2. Thus, just by exchanging the part of the thin bristles, this applying implement for hair dyeing is used for a long time. Also, by the synthetic resin integrally molding, the tip of the thin bristle part 11 is narrowed and the hair dyeing operation is facilitated.