To provide an electric toothbrush capable of sufficiently and beautifully polishing the inside of a mouth of an opponent at a childcare or nursing care site or the like. SOLUTION: A pair of toothbrushes 41, 42 implanted in the distal end portions of the rotary shafts 61a, 62a and disposed so that their bristles face each other, an electric motor connected to the rotary shaft to rotate the pair of toothbrushes , And between the pair of toothbrushes, an expansion / contraction section (3) for expanding and contracting the interval distance is provided. The extendable portion includes a rear end side support portion 32 connected to the handle portion 2 and a distal end side support portion 31 having a smaller diameter than the rear end side support portion and slidably fitted to the rear end side support portion Has been done. Further, the elastic member 22 b reduces the distance between the brushes. (FIG.【課題】保育や介護の現場などで対向した相手の口内を十分に綺麗に磨くことができる電動歯ブラシを提供する。【解決手段】回転軸61a,62aの先端部に植毛され、各々の毛先が対向するように配置された一対の歯ブラシ41,42と、回転軸が連結され一対の歯ブラシを回転させる電動モーターとを備え、一対の歯ブラシ間には、その間隔距離を伸縮させる伸縮部3が設けられている。伸縮部は、ハンドル部2に接続された後端側支持部32と、後端側支持部よりも小径で後端側支持部に摺動可能に嵌合された先端側支持部31とから構成されている。また、ブラシ間の距離を縮小させる弾性部材22bを備えている。【選択図】図8
