PROBLEM TO BE SOLVED: To provide an electric toothbrush excellent in tooth brushing performance and brushing handleability.SOLUTION: The electric toothbrush 1 includes: a body case 2 housing a motor as a vibration source a toothbrush 5 which is attached to the distal end part of the body case 2 and to which brush bristles 52 are planted and a holding part case 4 attached to a proximal end part which is an end part on the opposite side of the distal end part of the body case 2. When the length of a part directly facing the holding part case 4 at a front wall part on the front side of the body case 2 is defined as a length P and the length of a part directly facing the holding part case 4 at a rear wall part on the rear side of the body case 2 is defined as a length Q, the length Q is shorter than the length P.COPYRIGHT: (C)2011,JPO&INPIT【課題】歯の擦掃性能に優れ、磨き勝手のよい電動歯ブラシを提供する。【解決手段】この電動歯ブラシ1は、振動源としてのモータを収容する本体ケース2と、この本体ケース2の先端部に取り付けられてブラシ毛52が植設される歯ブラシ5と、本体ケース2の先端部とは反対側の端部である基端部に取り付けられる把持部ケース4とを含む。本体ケース2の前側の前壁部において把持部ケース4と直接的に対向する部分の長さを長さPとし、本体ケース2の後側の後壁部において把持部ケース4と直接的に対向する部分の長さを長さQとしたとき、長さQが長さPよりも小さい。【選択図】図5
