Treatment of frozen shoulder directed to improve the shoulder range of motion. Various interventions have been described including arthroscopic release. The optimal method of release is still controversy. Release of the rotator interval and coracohumeral ligament is considered a minimal invasive technique with promising results. A prospective study of 32 patients suffered from resistant frozen shoulder treated by arthroscopic rotator interval release. Visual Analog Score (VAS), active and passive range of motion of the affected shoulder was measured and UCLA (University of California Los Angeles) score was measured and compared pre-operatively during postoperative 1,3,12 months follow up. The mean VAS was 8±1.02 preoperative, 4±1.05 post after 1 month, 2.59±1.13 post after 3 months and 1.91±1.4 post after 12 months whereas the mean UCLA score was 26.84±3.13 post after 1 month, 30.34±2.88 Post after 3 month31.16±3.57 Post after 1 year 31.16 at 12 months. These patients demonstrated a statistically significant increase in shoulder motion in all 4 directions. VAS and UCLA score were statistically improve postoperatively. Arthroscopic rotator interval and coracohumeral ligament release for adhesive capsulitis are encouraging and provide an effective treatment modality to provide pain relief restore joint function.