Machine tool

A machine tool comprising:

• a plurality of machining units, each of the machining units including:
• a first saddle movable in a right-left direction;
• a second saddle supported by the first saddle and movable in an up-down direction;
• and
• a spindle device supported by the second saddle and movable in a front-rear direction, wherein
• the plurality of machining units are arranged in the right-left direction such that spindles provided in the respective spindle devices are parallel to each other;
• an X-axis moving mechanism that moves the first saddle in the right-left direction;
• and
• a control device that controls an operation of the X-axis moving mechanism during machining of a workpiece and during correction of a spindle spacing between the machining units,
• wherein a plurality of the X-axis moving mechanisms are provided corresponding to the respective machining units, and
• the control device moves the first saddle of a predetermined one of the machining units in the right-left direction using one of the X-axis moving mechanisms corresponding to the predetermined machining unit to correct the spindle spacing.