The invention relates to an apparatus for balancing an object (1) to be reciprocated in a vertical plane along a circular orbit, which apparatus comprises at least a frame part (2) and a pivot shaft (8) pivoted to the frame part (2), to which pivot shaft the object (1) to be moved is fixed, and which apparatus comprises at least a compensating means (9) that balances the changing force exerted by the weight of the object (1) to be moved. The apparatus also comprises at least means (4-6) that convert the moment produced by the compensating means (9) and transmit it to the pivot shaft (8) of the object (1) to be moved.