A detachment tool of the present invention is a tool for detaching a device attached to a wall portion. The detachment tool includes a member in which a first through hole and a second through hole are formed, a first screw that fixes the member to the device while inserted into the first through hole, and a second screw that pushes the wall portion while inserted into the second through hole. The first through hole is a threaded hole that screw-engages with the first screw or an unthreaded hole. The second through hole is a threaded hole that screw-engages with the second screw. According to such a configuration, the detachment tool in which operationality in detachment is good, flexible adaptation to a space can be made, and force applied in detachment is also easily managed, and a motor drive device provided with the same can be provided.