A planetary carrier (2A), formed of a cylindrical body, that receives a drive torque from a drive power source and differentially distributes the drive torque to a pair of output shafts, the planetary carrier (2A) including a gear holding portion (22A) that rotatably holds a planetary gear (2B) having two large and small gear portions (20B, 21B), of which pitch circle diameters differ from each other. The gear holding portion (22A) has a first gear supporting surface (2200A) that slidably supports tooth tip surfaces of the gear portion (20B), of which the pitch circle diameter is larger, on a portion except on the radially inner side with respect to the carrier (2A), and a second gear supporting surface (2210A) that slidably supports tooth tip surfaces of the gear portion (21B), of which the pitch circle diameter is smaller, on a portion except on the radially outer side with respect to the carrier (2A).