Abstract Background: Obstetrical brachial plexus injury occurs as a result of forceful traction of the upper extremity for a long period of time during delivery and/or compression injury. Which result in internal rotation contracture of the shoulder and loss of external rotation. which may benefit from release of the contracture, tendon transfers. Aim of Study: This study we do teres major transfer and subscapularis sliding and measure shoulder function improve-ment. Patients and Methods: We conducted a randomized trail study over 20 patients with internal rotation contracture due to obstetric brachial plexus palsy. From 2015 to 2017 in Abo El Resh Hospital. We done subscapularis sliding combined with Teres major transfer for. The mean age at the time of operation was 2 years. We used modified gilbert score to asset shoulder function pre and postoperative. Results: All patient after surgery show marked improve-ment of shoulder abduction and external rotation. Severe external rotation contracture occurred in 3 patients. Conclusion: After subscapularis sliding with teres major transfer have perfect result in improving of shoulder function with increase the risk of external rotation contracture after transfer.