A gear is configured such that: a ring gear, a drive pinion shaft having a pinion gear meshing with the ring gear, and rolling bearings supporting the drive pinion shaft such that the drive pinion shaft is rotatable are accommodated in a differential housing; the differential housing is divided into a differential mechanism chamber in which to accommodate the ring gear, and a pinion shaft chamber in which to accommodate the rolling bearings; and a feed oil passage configured to supply lubricant scooped up by the ring gear to the pinion shaft chamber, and a return oil passage configured to discharge the lubricant in the pinion shaft chamber to the differential mechanism chamber are provided in the differential housing. In the differential gear, an inlet of the feed oil passage is placed at a position that is offset from the ring gear in an axial direction of the ring gear.