An electric toothbrush,Including grip unit,1. The first toothbrush unit,A second toothbrush unit and a driving unit,The first toothbrush unit is arranged on the grip unit.And can be driven to swing relative to the grip unit.The second toothbrush unit is adjacent to the first toothbrush unit and is arranged on the grip unit.And can be driven to swing relative to the grip unit.The driving unit includes a motor arranged on the grip unit.And a driving shaft which is driven by the motor and rotates around an axis line of itself,The driving shaft has a first eccentric part which drives the first toothbrush unit to swing.And a second eccentric part which drives the swing of the second toothbrush unit.The driving shaft drives the first eccentric part of the first toothbrush unit swing and the second eccentric part of the second toothbrush unit swing.The first toothbrush unit and the second toothbrush unit can swing mutually.It is more convenient to clean the teeth.一種電動牙刷，包含握把單元、一第一牙刷單元、一第二牙刷單元及一驅動單元，該第一牙刷單元設置於該握把單元，並可受帶動而相對該握把單元擺動，該第二牙刷單元相鄰該第一牙刷單元設置於該握把單元，並可受帶動而相對該握把單元擺動，該驅動單元包括一設置於該握把單元的馬達，及一受該馬達連動而繞自身的一軸心線轉動的驅動軸，該驅動軸具有一帶動該第一牙刷單元擺動的第一偏心部，及一帶動該第二牙刷單元擺動的第二偏心部，藉由該驅動軸帶動該第一牙刷單元擺動的第一偏心部及帶動該第二牙刷單元擺動的第二偏心部的設置，使該第一牙刷單元及該第二牙刷單元能夠交互擺動，而更方便對牙齒進行清潔。
