Abstract Background: It is currently unclear as to whether there is a difference in the clinical effectiveness of an arthroscopic capsular release compared to a manipulation in patients with primary adhesive capsulitis. Aim of Study: The aim of the work was to compare the functional outcome in shoulder ROM, patient-reported out-comes and complications when comparing MUA and arthro-scopic capsular release in the management of adhesive capsulitis. Material and Methods: This study was conducted in Cairo University Hospitals between January 2014 and April 2018. The study was carried on 60 patients with primary frozen shoulder were included in the study. Arthroscopic capsular release was done for 30 patients (30 shoulders affection) (Arthroscopic group A), while manipulation under general anasthesia was done for 30 patients (30 shoulders affection) (Manipulation group B). All patients were evaluated clinical-lywith the range of motion (ROM), American Shoulder and Elbow Surgeons (ASES) score, and visual analogue scale (VAS) pain score. Results: No significant difference or association regard complications between groups, Satisfaction significantly occurred regards lower HbA1C in both group. Conclusion: Both arthroscopic capsular release and MAU are effective modalities for management of adhesive capsulitis. However, arthroscopic capsular release leads to better im-provement in the ROM than MUA. A low overall complication rate was observed in both groups.