Planetary gearbox which comprises: - a sun gear which rotates about a rotational axis of the planetary gearbox and is driven by a sun shaft, the rotational axis defining an axial direction of the planetary gearbox, - a plurality of planetary gears which are driven by the sun gear, - an internal gear, with which the plurality of planetary gears are in engagement, and - a plurality of planetary plain bearing pins which in each case have an outer-side bearing face which has an axially front end and an axially rear end, - in each case one planetary plain bearing pin being arranged in a planetary gear, and the planetary plain bearing pin and the planetary gear forming a lubricated plain bearing, - the planetary plain bearing pins in each case configuring a convexity on their bearing face, in the sense that their external diameter (e) decreases from a maximum external diameter towards at least one axial end (65, 66) of the bearing face and has a minimum at the axial end (65, 66), characterized in that the planetary plain bearing pin has minimum external diameters (d1, d2) at the two axial ends (65, 66) of the bearing face and the maximum external diameter between the axial ends (65, 66), the minimum external diameters (d1, d2) at the two axial ends (65, 66) being different, and/or in that the planetary plain bearing pin has a maximum of its external diameter outside its axial centre and between the two axial ends (65, 66) of the bearing face here. - a sun gear which rotates about a rotational axis of the planetary gearbox and is driven by a sun shaft, the rotational axis defining an axial direction of the planetary gearbox, - a plurality of planetary gears which are driven by the sun gear, - an internal gear, with which the plurality of planetary gears are in engagement, and - a plurality of planetary plain bearing pins which in each case have an outer-side bearing face which has an axially front end and an axially rear end, - in each case one planetary plain bearing pin being arranged in a planetary gear, and the planetary plain bearing pin and the planetary gear forming a lubricated plain bearing, - the planetary plain bearing pins in each case configuring a convexity on their bearing face, in the sense that their external diameter (e) decreases from a maximum external diameter towards at least one axial end (65, 66) of the bearing face and has a minimum at the axial end (65, 66), characterized in that the planetary plain bearing pin has minimum external diameters (d1, d2) at the two axial ends (65, 66) of the bearing face and the maximum external diameter between the axial ends (65, 66), the minimum external diameters (d1, d2) at the two axial ends (65, 66) being different, and/or in that the planetary plain bearing pin has a maximum of its external diameter outside its axial centre and between the two axial ends (65, 66) of the bearing face here. characterized in that the planetary plain bearing pin has minimum external diameters (d1, d2) at the two axial ends (65, 66) of the bearing face and the maximum external diameter between the axial ends (65, 66), the minimum external diameters (d1, d2) at the two axial ends (65, 66) being different, and/or in that the planetary plain bearing pin has a maximum of its external diameter outside its axial centre and between the two axial ends (65, 66) of the bearing face here.