PROBLEM TO BE SOLVED: To provide a toothbrush having a head part that is easily inserted into an oral cavity.SOLUTION: A toothbrush 90 comprises a body 1 having an elongated shape in one direction, and a brush member 2 having a cylindrical shape and attached to an end of the body 1 in a longitudinal direction. The brush member 2 includes a head part 4 having a bristled surface 4a on which bristles 210 are erected along the longitudinal direction of the body 1 to be attached, and a neck part 3 fitted onto the end of the body 1. In the head part 4, a back face opposite to the bristled surface 4a is opened. The neck part 3 is provided with a coming-off prevention mechanism 200 for preventing the end of the body 1 from coming off.SELECTED DRAWING: Figure 2A【課題】口腔に挿入し易いヘッド部を有する歯ブラシを提供する。【解決手段】本発明に係る歯ブラシ９０は、一方向に細長い形状を有する本体１と、筒状形状を有し、本体１の長手方向の端部に装着されるブラシ部材２とを備える。ブラシ部材２は、装着される本体１の長手方向に沿って、毛２１０が立設された起毛面４ａを有するヘッド部４と、本体１の端部の周りに嵌合して装着されるネック部３とを含む。ヘッド部４では、起毛面４ａとは反対側の背面が開口され、ネック部３には、本体１の装着された端部が抜けるのを防止する抜け防止機構２００が設けられている。【選択図】図２Ａ
