A driving device (100) is provided with first and second rotating electrical machines (MG1, MG2); an inverter (30); a first storing case (23) having a first rotating electrical machine storing section (21) for storing the first rotating electrical machine (MG2), and an inverter storing section (300) for storing the inverter (30); and a second storing case (13) which can store the second rotating electrical machine (MG1) and can be attached to the first storing case (23); a first terminal section (121) connected to the inverter; and a second terminal section (15) which is arranged on the second storing case (13) and is connected to the second rotating electrical machine (MG1). The first terminal section (121) and the second terminal section (15) are arranged so that one protrudes toward the other.