PROBLEM TO BE SOLVED: To provide a toothbrush having high cleaning performance in both cervical area and tooth surface and excellent usability in cleaning the tooth cervix and cleaning the tooth surface.SOLUTION: The toothbrush includes a head part 10 formed with a plurality of implanting holes and implanted with tufts of a plurality of bristles in the implanting holes and a handle part extended from the head part 10. In the area of 35 to 75% of the length L2 of the implanting area 12 running from the base end to the tip of the head part 10, the toothbrush has a pair of side edge tuft groups formed by implanting the side edge tufts adjoining each other across a middle line M of the implanting area 12 running from the base end to the tip of the head part 10, implanted apart from each other at a distance of 25 to 50% of the length L4 perpendicular to the middle line M of the implanting area 12 and a central bristle tuft group formed with implanted central bristle tuft between the pair of side edge tuft groups, wherein the length of the central bristle is 90% or less of the length of the side edge tuft.COPYRIGHT: (C)2013,JPO&INPIT【課題】歯頸部および歯面の清掃性が共に高く、且つ、歯頸部清掃時および歯面清掃時の使用感に優れた歯ブラシを提供する。【解決手段】本発明の歯ブラシは、複数の植毛穴が形成され、該植毛穴に複数の用毛を束ねた毛束が植毛されたヘッド部10と、ヘッド部10に延設されたハンドル部とを備える歯ブラシにおいて、ヘッド部10の基端から先端に向かう、植毛領域12の長さL2の35~75%の領域に、ヘッド部10の基端から先端に向かう植毛領域12の中心線Mを挟んで隣接する側縁毛束同士が、植毛領域12における中心線Mと直交する方向の長さL4の25~50%の距離で離間して植毛されて形成された一対の側縁毛束群と、該一対の側縁毛束群の間に、中央毛束が植毛されて形成された中央毛束群とを備え、中央毛束の毛丈は、側縁毛束の毛丈の90%以下である。【選択図】図2
