Abstract: A windscreen wiper system, designed in particular for road vehicles, providing a non-circular path of any one of the points of at least one windscreen wiper blade and comprising a shaft having an alternating rotational movement which drives a main guide arm associated with the said shaft by a pivot joint, characterized in that it comprises, on one hand, a rocker (2) associated with the main guide arm (3) by a further pivot joint and, on the other hand, a secondary guide arm (4) articulated at two of its points, each articulation comprising at least two pivot joints, one of the above-mentioned articulations connecting it to the rocker (2), the blade (1) being articulated by a pivot joint on the rocker (2).