To provide a machine tool having a small number of parts and capable of finely adjusting the position of a tool attached to a turret member.

A machine tool has a direct drive in which a rotor 48b of a built-in motor 48 is directly attached to a rotation shaft section 46b of the turret member 46. In addition, when a desired tool T is determined from a plurality of tools T attached to the turret member 46 and a workpiece W is processed, the machine tool drives a hydraulic mechanism 54 and clamps a brake disk 51 with a brake pad 52, thereby fixing the turret member 46 to be unrotatable to a housing 42 by frictional force.