A carrier is provided with a first and a second oil passage. The first oil passage is formed so as to communicate a first side surface opening that is open to a first carrier side surface with a first outer peripheral opening that is open to an outer peripheral shaft surface, and the second oil passage is formed so as to communicate a second side surface opening that is open to a second carrier side surface with a second outer peripheral opening that is open to the outer peripheral shaft surface. A first oil receiving portion is formed so as to guide oil supplied from an inner side in a carrier radial direction to the first side surface opening, and a second oil receiving portion is formed so as to guide the oil supplied from the inner side in the carrier radial direction to the second side surface opening.
