An electric toothbrush includes an electric toothbrush main body that includes a grip portion a brush member that includes a brush a motor that moves the brush an actuator that relatively rotates the brush member with respect to the electric toothbrush main body in order to change an orientation of the brush an acceleration sensor that detects an attitude of the main body and a CPU that controls the actuator such that a brush angle becomes a predetermined optimum value based on the detected attitude.
