Problem to be solved: to increase the penetration of the teeth to the teeth, and to improve the sweep ability between the teeth.The electric toothbrush 10 comprises a shaft 22 to which the brush 30 is mounted, a main drive portion 23 for operating the shaft 22 for the purpose of purging the brush 30, and a sub driving portion 24 for eccentrically rotating the shaft 22.Diagram【課題】歯間への毛の進入性を高めることで、歯間に対する刷掃性の向上化を可能とする。【解決手段】電動歯ブラシ10は、ブラシ30が取り付けられる軸体22と、ブラシ30の刷掃動作のため、軸体22を動作させる主駆動部23と、軸体22を偏心させる副駆動部24とを備える。【選択図】図2