To efficiently arrange a clutch disengaging mechanism and a brake releasing mechanism in a driving device to improve mountability on a vehicle, in the driving device equipped with a clutch unit and a brake unit where a frictional force between relatively rotating members is generated by an elastic force of a spring.

A clutch spring (34) and brake springs (45, 52) are arranged adjacently to each other in a direction along an input shaft (4). The clutch disengaging mechanism (56) and the brake releasing mechanism (57) are arranged overlapping with each other between the clutch spring (34) and the brake springs (45, 52).