The machine tool drive regulation device stops the driving of the motor when the door (18), which is provided in a cover (17) that covers driven objects that are driven by the motor, is open. The drive regulation device is provided with: a detecting means (21) that detects whether the door (18), which is provided on the cover (17) that covers the driven objects that are driven by the motor, is open or closed; an energization-operating means (22) for switching between an energized state and a de-energized state of the motor; a speed-regulating means (23) that executes an action to re-stop the motor when the stopped motor rotates in excess of a prescribed allowed rotation rate; and a speed regulation-switching means (24) that controls the speed-regulating means (23) so that, when the detecting means (21) detects that the door (18) is open, the speed-regulating means (23) is operated when the motor is energized, and the speed-regulating means (23) is not allowed to operate when the motor is not energized.