PROBLEM TO BE SOLVED: To provide a toothbrush which allows an N-type semiconductor to exhibit photocatalysis with high efficiency without using light from outside.SOLUTION: A toothbrush has a body part 12 that has an electrically conductive part and serves as a handle, a titanium oxide rod 17 provided at the tip of the body part in longitudinal direction, a brush part 16 having a transparent brush base body 15 in which brush bristles are embedded, an ultraviolet light-emitting element 18 provided at the tip of the body part, and a battery 30.COPYRIGHT: (C)2016,JPO&INPIT【課題】外部からの光を使用せずに、N型半導体に効率の良い光触媒作用を発生させることができる歯ブラシを提供する。【解決手段】歯ブラシは、導電部を備えた、柄となる本体部12と、本体部の長手方向の先端に設けられている酸化チタン棒17と、ブラシ毛が埋め込まれている透明なブラシ基体15を備えるブラシ部16と、本体部の先端に設けられた紫外線発光素子18と、電池30とを備える。【選択図】図3
