A differential device includes: an input member inputted with driving force; a differential gear supported in the input member and capable of rotating relative to the input member and revolving around rotation center of the input member with rotation of the input member; paired output gears each including a tooth portion meshing with the differential gear and a shaft portion located radially inward of the tooth portion; a washer interposed between the input member and back surface of the tooth portion; and an oil groove provided in a recess shape in surface of the input member facing back surface of each output gear and extending from periphery of the shaft portion to back surface of the washer. The oil groove is arranged offset in peripheral direction of the output gear from a meshing portion between the tooth portion and the differential gear.