The utility model provides an electric tool, comprising a small-size lithium ion storage battery used as a driving source. At least one lithium ion storage battery having a diameter of 14mm is disposed in a handle part of an electric tool body. The lithium ion storage battery has adequate output features required by electric tool driving. When a switch disposed in the electric tool body is operated by a user, the electric power is supplied to a driving unit having a motor, and thereby the electric tool is actuated. The lithium ion storage battery has a set type, or is directly accommodated in the handle part. The handle part capable of accommodating three lithium ion storage batteries is designed to have a diameter of 51.8mm or less than 51.8mm.