DRIVING DEVICE

A drive device (1) is provided with an electric motor (80), a rotating shaft (870), a motor case (830), a printed circuit board (30), power conversion circuits (120, 220), a rear frame end (837) serving as a heat dissipation member, a gel (G) serving as a heat transfer member, a plurality of mounting members (R), and the like. The heat dissipation member is located on one side of the printed circuit board and faces the motor-side surface of the printed circuit board, and a plurality of switching elements (123, 223) are mounted to the motor-side surface. The gel is plastically deformed and adhered to the switching element and the heat dissipation member for transferring heat of the switching element to the heat dissipation member. At least one of the mounting members (R) is mounted to the printed circuit board and located at a position between the through-hole facing region (A1) and a switching element located closest to a rotation angle sensor (29) mounted to the printed circuit boardin the through-hole facin