In order to facilitate reuse of an NC program for operation that has been executed in the past, this control device (13) for a machine tool that drives the machine tool (11) by executing an NC program is provided with: a first program storage unit (23) that identifies an NC program for machining using a program name or program number and stores said program; a second program storage unit (33) that stores an NC program for operation each time an operator executes an NC program for operation that is input manually; and a display unit (15) that lists a plurality of NC programs for operation stored in the second program storage unit (33) and displays said programs.