Electric toothbrush

An electric toothbrush comprising:

• a body comprising a drive shaft driven by a rotary motor;
• a head detachably attached to the body, the head comprising a power transmission mechanism capable of transmitting power of the rotary motor and an acting member operated by the power transmitted from the power transmission mechanism;
• and
• a brush handle comprising bristles and detachably attached to the head,
• wherein
• the power transmission mechanism includes a power transmission unit attachable to the drive shaft in a state where idling is suppressed,
• the body and the head comprise a vibration receiver capable of receiving vibration in three or more directions intersecting each other on a plane orthogonal to the drive shaft,
• both of the body and the head are provided with at least one fitting member capable of being releasably fitted,
• the fitting member also serves as the vibration receiver,
• the at least one fitting member comprises three or more fitting members,
• each of the three or more fitting members provided in the body and the head is fitted to each other,
• the three or more fitting members are provided in three or more positions in the body and the head, and
• the at least one fitting member is arranged so as to form at least one virtual triangle in which the drive shaft is arranged in a region when viewed from an axial direction of the drive shaft.