Windscreen wiper arm with a nozzle

Windscreen wiper arm (10) for a vehicle, in particular a car, comprising an end portion in the form of a cowl (31) formed to hold a wiper blade, said cowl comprising a wall (32a) oriented longitudinally, characterised in that a cut-out (33) passes through the thickness of said wall, said cut-out being able to accommodate a pipe (48) for supplying window-cleaning liquid.