The scope of the invention is an unloading-dynamic intervertebral device consisting of two bars (1,2) cooperating with each other, where each of them is ended from one side with a shaped bearing (3,4) for bony elements of the spine. One of the bars (1,2) is provided with a guideline (5), whereas the other with a guide (6), moreover, the first bar (1,2) is provided with at least one tang (7), situated in the corresponding shaped gap (8) of the other bar (2,1), assuring rotatable and rotatable-sliding cooperation of the bars (1,2) crossing in the open position of the device. The device is equipped with a mechanism blocking rotational movement of the bars (1,2) in the closed position.
