To reduce noise and vibration of a vehicular differential gear device equipped with a planetary gear mechanism.

A sun gear 6 having helical teeth is rotatably fitted on a concentric circle inside an internal tooth gear having helical teeth. A plurality of planetary gears 8 having helical teeth and held to a planetary carrier 10 are arranged between the internal tooth gear 4 and the sun gear 6 and meshed with the internal tooth gear 4 and the sun gear 6. In operation, differential limiting is performed by frictional resistance between a tip surface 8a of the planetary gear 8 and a planetary gear holding part of the planetary carrier 10. A large number of micro recesses are formed in an irregular state on the tip surface 8a and an axial end face 8b of the planetary gear 8. Since the recesses are not formed as a continuous groove but formed in pocket shape, lubricating oil can be surely held. The wear resistance and seizure resistance of the planetary gear 8 and planetary carrier 10 are thereby improved, and noise and vibration are reduced.