Rotator cuff tears are observed to be the common amongst the elderly and athletes. There are many techniques for repairing the rotator cuff tears such as open supraspinatus tear repair, mini-open tear repair, arthroscopic, etc. Although, previous studies have shown that both techniques are associated with good clinical outcomes, the most effective method of repair is yet to be determined. The aim of the present study was to evaluate the early and late clinical results of arthroscopic technique versus open repair technique in patients with full-thickness rotator cuff tears. It was a randomized clinical trial performed on 100 patients undergoing rotator cuff repair using arthroscopic technique or open repair technique. Patients with complains of shoulder pain, visiting OPD between July 2019 and June 2020, were evaluated for the presence of a full thickness rotator cuff tear. Evaluation was done using the simplified version of the Disabilities of the Arm, Shoulder and Hand (DASH) Score and Constant Murley Score (CMS). Pain was rated using a self-rated visual analog scale (VAS). Forward Flexion and External Rotation, of the shoulder joint in both groups was improved postoperatively and there was no statistically significant difference between the groups at any point of time. The VAS was significantly higher at Post-operative Day 1 and Month 1 for open repair technique as compared to arthroscopic technique. The DASH score was significantly higher at Post-operative Month 3 and Month 6 for open repair technique as compared to arthroscopic technique. The CMS was significantly higher at Post-operative Month 1 for arthroscopic technique as compared to open repair technique. Both the techniques deliver similar results in long-term outcome, but arthroscopy technique delivers better recovery at short-term follow-ups.