The invention relates to an improved support for a mudguard. The support at hand comprises an L-shaped arm (1) to which an arcuate support (2) is fastened and the mudguard is connected to the arcuate support (2); a removable fastening means is provided and makes it possible to fasten the arcuate support (2) to the arm (1) in a position chosen from among a plurality of different positions of the support (2).