An object of the present invention is to provide an electric toothbrushwith a thinner handle part to ensure the ease of manual tooth-brushingwhile improving the ease of a switch operation between the operating stateand the stopped state, the electric toothbrush being configured to realize aneffective oral cleaning by automatically giving a necessary mechanicalassistance to a brush part according to the brushing state constantly varyingduring tooth-brushing depending on the cleaned part and the ways ofholding and moving the toothbrush.The electric toothbrush includes: a toothbrush main body (2) having abrush part (15) and a handle part (20) for manually operating the brush part(15)； a vibration generation means (3) that vibrates the brush part (15)； anacceleration sensor (4) that detects a manual brushing action； and a controlmeans (5) that controls at least the vibration generation means (3).
