To provide a multifunction tool which can be used in combination with a conventional machine tool with such as a drill or a screw driver and can perform varied work processes without preparing any different tool for respective different work processes.

A drill tool, which is connected to a machine tool directly or via an adapter so as not to be rotated, is integrally formed into a rotation symmetric shape, and along its vertical axis line, at least two different sections, in other words, a drill section 4 provided with at least one spirally extending groove and a shank section 3 provided with a hexagonal cross section are arranged. In addition, the shank section 3 is provided with another function section 2 for performing another working process in the end part on the opposite side to the drill section 4 side.