A planetary transmission, comprising a housing, a drive part, an output part having an output shaft that is rotatable about an output axis of rotation, and at least one gear stage between the drive part and the output part. The drive part, the at least one gear stage, and the output part are mounted in the housing, the housing has an output flange on the output side, wherein the output flange has a first lateral surface with circularly symmetrical in radial planes about an axis of symmetry, wherein the first lateral surface is arranged eccentrically with respect to the output axis of rotation.