TRAILER COUPLING WITH FLANGE PORTIONS

The invention relates to a trailer coupling (10) with a holder (20) and coupling arm (15), wherein the coupling arm (15) comprises a holder part (30) with a plug projection (33) for insertion into a plug receptacle (24) of the holder (20) and a coupling part (60), wherein the holder part (30) and the coupling part (60) are connected to one another by means of flange parts (40, 66) which are bolted together, and wherein the plug projection (33) of the holder part (30) can be locked in the plug receptacle (24) of the holder by means of a locking device (70). It is provided that for adjusting different distances the support surface (58) of at least one flange part forming a first flange part (40) has such a longitudinal extension (50) that the support surface (67) of the other flange part forming a second flange part (66) can be mounted on the first flange part (40) in a first and at least one different second mounting longitudinal position (M1, M2), and that the first flange part (40) has a first screw arrangement (59) to which a second screw arrangement (69) of the second flange part (66) fits in the first and the at least one second mounting longitudinal position (M1, M2).