Aim. To develop a method of acromioclavicular joint stabilization with the TightRope system using «mini-open» technique and to evaluate effectiveness and safety of this surgery. Methods. The study involved 11 patients with Rockwood type III, IV and V acromioclavicular joint dislocation, who underwent «mini-open» surgery of acromioclavicular joint stabilization using the TightRope device. The results were evaluated clinically using the Constant scale and radiologically 3, 6, and 12 months after the treatment. The results obtained were statistically processed and compared to the results of the treatment of patients with the same pathology published in the foreign literature. Results. In the early postoperative period (up to 3 months after the surgery) functional result according to Constant scale in the studied patients varied in the score range of 67.5±16.2. In the period of up to 12 months all patients had 82.5±11.5 score, which corresponds to good and excellent results and does not show significant difference compared to the arthroscopic technique (according to literature data). Complications among observed patients occurred in 18% and were identified in 2 patients (1 case of fixation loss, 1 local skin inflammation in the area of the wound). Conclusion. New surgical techniques allow achieving good and excellent functional results and to improve patient satisfaction.