A motor control device is provided. In this motor control device, a first switching circuit group and a second switching circuit respectively provided between first and second microcomputers and first and second power converters receive drive signals generated by the microcomputers included in the own system and other drive signals generated by a microcomputer other than the microcomputers of the own system, select the own drive signal or the other drive signal according to selection signal from the microcomputers of the own system, and output the selected drive signal to the power converter of the own system. The first and second microcomputers output the selection signals to the switching circuit groups of the own system so as to select the own drive signal when the microcomputers are operating normally, and output the selection signal so as to select the other drive signal when a monitoring circuit of the system detects an faulty in the microcomputers.