To provide a tapered bristle excellent in interdentium approach property, abutting feeling and also real brushing feeling of a bristle tip.

In the tapered bristle 1 made of a resin in which at least one end of the bristle tip is made into a tapered part 2, a resin mixture prepared by mixing a plurality of resins is used as the resin constituting the bristle 1. The combination and mixing ratio of the resins are changed, thereby controlling the bristle strength of the tapered bristle freely and delicately and obtaining controlled and the tapered bristle excellent in interdentium approach property, abutting feeling and also real brushing feeling of the bristle tip.