An elastic ring (R2) is disposed between a grip section case (4) and a body section (21) which is formed on an inner case (20) of a body case (2) to which a toothbrush head (5) is mounted. As a result, the vibration of a motor (M) which is contained in a motor containing section (27) of the inner case (20) is less likely to be transmitted to the grip section case (4) because of the elastic ring (R2), and is transmitted to the toothbrush head (5) side in a concentrated manner. Also, the tooth cleaning performance is increased, and vibration to the hand which grips the grip section case (4) is reduced to enable the user to comfortably brush the teeth.
