to provide an operation control device for a vacuum pump and a method for stopping the operation of the vacuum pump that make it possible to effectively remove products , resulting from solidification and liquefaction of gas in a casing and possibly hindering the rotation of a pump rotor , so that the vacuum pump may be started normally . an operation control device 10 for a vacuum pump having a pump rotor 1 disposed in a casing 2 for free rotation includes a pump rotor control section 15 for controlling the rotation of the pump rotor 1 . the pump rotor control section 15 has a function to , after a pump stop action has been taken , rotate the pump rotor 1 in forward and / or reverse directions according to a predetermined timing pattern and then stop the pump rotor 1 .