The aim of the invention is a connection of a farm tractor counterweight with a transportation box that is closed and opened by the vehicle operator. The additional aim of the invention is to adjust the weight of the counterweight in order to make it universal. The invention is a counterweight, particularly for an agricultural tractor, which comprises a body (1) with a hook (2) fixed to its top and bolts (3) fixed to the body's (1) side surfaces, whereby a box is fixed to front of the body (1), and the box comprises a bottom plate (4) joined with a back wall (5), a front wall (6), and side walls (7). t, characterized in that an actuator (9) is fixed to the central part of the bottom plate (4) by its first end, employing an actuator first hinge (8a) and the second end of the actuator (9) is fixed, employing an actuator second hinge (8b), to a cover (10). On the inner side of the back wall (5), on each side of the actuator (9), there is fixed a bushing (11), in which there is a piston (12) seated, the top end of which is connected by a hinge (13) of the piston (12) to the cover (10).
