Abstract: A device for deviating objects moving on a conveyor (13) in a direction (F) has a deflecting arm (1) passing from an inactive position to an active position in which it is transverse to the conveyor (13) by a combined movement during which it moves in the same direction (F) as the conveyor (13) while pivoting on itself. The device has two arms (1, 2) articulated one on the other--a first, deflecting (1), articulated at the end (8) of a second, carrying arm (2). The second arm (2) is directed in an opposite sense to the displacement (F) of the conveyor (13), being carried by a vertical drive shaft (12), situated on the side of the conveyor (13), this shaft driving it in rotation either in one direction or in the other. The end (1a) of the first arm (1) is guided in a track (3, 4) forcing it to move along the conveyor (13).