Differential device

The invention relates to a differential device, which suppresses volume increase of a cover and a housing and supplies lubricating oil to the interior of the differential device. This differential device is provided with: a pinion gear; a pinion gear shaft which supports the pinion gear in a manner that the pinion gear can rotate freely; a pair of side gears that mesh with the pinion gear and are fitted to a pair of drive shafts; a differential case that supports the pinion shaft, accommodates the pinion and the side gear, and has an opening on one side of the drive shaft; and a differential cover which has a hole through which one side of the drive shaft passes, is fixed to the differential case and closes the opening, and is provided with an oil passage. The oil passage passes through the hole from an inner surface facing the side gear to an outer surface on the opposite side of the differential case and through which lubricating oil flows. 本发明涉及一种差动装置，抑制罩、外壳的体积增加并向差动装置的内部供给润滑油。本发明的差动装置具有：小齿轮；小齿轮轴，所述小齿轮轴将所述