In an apparatus for preventing theft of equipment (electric wheelchair) having a prime mover (electric motor), a prime mover controller, and an authenticator that acquires ID information from an electronic key when the key is brought close thereto by an operator, determines whether the acquired ID information corresponds with authentication ID information, and permits the controller to start the prime mover when the acquired ID information is determined to correspond with authentication ID information, the controller stores operating history of the equipment, and the authenticator acquires the history from the controller when the key is brought close thereto and transmits the acquired history to the key when the key is brought close thereto, thereby making it easy to acquire the operating history of the equipment.