A beating device for the harvesting of fruits from fruit trees has a pair of beating members (5, 6), which are movable between an open position and a closed position under the thrust of an actuating cylinder (7; 57) and are defined by respective rocker arms (33, 34), one of which has an intermediate point hinged to an output rod (13) of the actuating cylinder (7; 57), and a first arm (36) connected to a containment jacket (8) of the actuating cylinder (7; 57) itself by means of a first rod linkage (37) and the other has an intermediate point connected to the containment jacket (8) through a second rod linkage (38) and a first arm (39) hinged to the output rod (13).