Machine tool

A machine tool, comprising:

• a tool post which is configured to retain one or more tools and is linearly moved along a direction parallel to a first axis and along a direction parallel to a second axis orthogonal to the first axis;
• a workpiece spindle device which is configured to retain a workpiece in a condition rotatable about an axis parallel to the second axis;
• and
• an in-machine robot installed in a machining chamber, the robot comprising a plurality of joints and a plurality of links for connecting the joints,
• wherein the plurality of joints in the in-machine robot comprise at least;
• a base joint which rotates about an axis parallel to the second axis, and
• three parallel joints which respectively rotate about axes orthogonal to the axis of rotation of the base joint, the three parallel joints being located closer to a distal end of the in-machine robot than the base joint and successively arranged from the base joint toward the distal end, and
• wherein the axis of rotation of the base joint is displaced from the axis of rotation of the workpiece spindle device.