We evaluated the results of arthroscopic rotator cuff repair. Thirty cases of rotator cuff tear were treated by arthroscopic rotator cuff repair at the Thong Nhat hospital from 1/3/2012 to 30/6/2016. All patients were over 18 years old, had positive rotator cuff tear tests, and underwent X-ray and magnetic resonance imaging. The arthroscopic images showed rotator cuff tears, with indication for repair. The functional status of each patient was evaluated using the Constant-Murley Scale and the criteria of the University of California at Los Angeles (UCLA). During postoperative rehabilitation, we applied Cohen's protocol. Seventeen patients were female and 13 were male. The median age was 54 years (21-83). Sixteen patients had partial thickness tears and 14 patients had full-thickness tears. Repair technique: single-row in 13 patients, suture-bridge in 15 patients, transosseous-equivalent in two patients. Four patients with SLAP lesions were treated by debridement labrum for type I, and labral repair for more serious lesions. Five patients with long head biceps tendon rupture were treated with tenodesis. After surgery, 100% of patients were subjected to fluid extravasation through the shoulder joint, but did not have any compartment syndrome; all incisions healed good without infection or neurapraxia. The mean UCLA score was 32.4 (14 patients had excellent results, 14 ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 20 (1): gmr18745 V.T. Toan et al. 2good, and two fair). The mean Constant score was 38.5; the mean postoperative Constant score was 88.77 (p = 0.001). Among the patients, 90% achieved 80% function compared to a normal shoulder. All patients gave their consent to the study and were prepared for the full course of treatment and arthroscopic surgery. Repair of the rotator cuff was for some participants the only effective treatment and a way to restore the shoulder. Postoperative reconstruction of the rotator cuff of the shoulder resulted in a significant improvement in the indicators of the functional state of the shoulder joint.