Background: The management of acute Rockwood type III Acromioclavicular joint (ACJ) dislocation remains controversial. Good-to-excellent results can be obtained with nonsurgical management, however, surgical management for type III acute ACJ dislocation restores joint anatomy, thus avoiding obvious deformity, persistent pain and residual symptoms. Methods: In this prospective studynineteen (14 men, 5 women) patients, withRockwood type III (ACJ) dislocation, underwent coracoclavicular (CC)ligament reconstructive surgery using a semitendinosus autograft and a triple non-absorbable suture-cerclage. The mean patient age was 33.1 years (range, 19-46). All patients were evaluated clinically preoperativeand at final follow-up usingVisual Analogue Scale,Constant Shoulder Score and DASH scoreand evaluatedradiologicallypreoperative, on the second day postoperative and at final follow-upusingCoracoclavicular distance (CCD) difference to the unaffected side.The mean follow-up was 25 months (range, 18-37). Results: At the final follow-up, the Visual Analogue Scale (mean 0.7) revealed a good to excellent clinical outcome. The mean Constant-Murley score was 95.2 (range 77–100). The DASH score (mean 3.52 points). The difference in the CCD compared to the contralateral side was <5 mm for 17 patients, between 5-10 mm for 2 patients. In the anteroposterior (AP) plane, 19 (100%) of the patients maintained complete reduction. Conclusion: Acromioclavicular joint reduction with reconstruction of the coracoclavicular ligament using semitendinosus tendon autograft and a triple non-absorbable suture-cerclageappears to be a good means with satisfactory clinical and radiological results for treating acute Rockwood type II Acromioclavicular dislocation.