To provide a transmission promoting reduction of costs, miniaturization, reduction of the weight, and energy saving.

A clutch device 31 is provided to intermittently transmit the rotating force from a drive side transmission route 20 to a driven side transmission route 21 by inputting the rotation of a motor 11 to a drive side input shaft 17 provided in the drive side transmission route 20, transmitting the rotation to a driven side input shaft 18 provided in the driven side transmission route 21, reducing the rotating seed with a speed change gear mechanism 14, and outputting the rotation from the output shaft 15 to a pump shaft 4. The speed change gear mechanism 14 is provided with an oil supply pump 78 for supplying lubricating oil to the speed change gear mechanism 14, and the oil supply pump 78 is driven by the rotating force of the drive side input shaft 17.