Abstract:[Objective] To introduce the surgical technique and preliminary clinical outcomes of arthroscopic release and implant re- moval for previous open reduction and internal fixation of proximal humeral fractures. [Methods] The patient, male, 73 years old, had im- plant retention of the right proximal humeral fracture accompanied with limited motion for 30 months. Conventional shoulder arthroscopy approach was used to clean up the adhesion scar and hyperplasia of synovial tissue in glenohumeral and subacromial spaces, and acromio- plasty. A small incision was added on the lateral side, as soft tissue covered on implants was debrided under arthroscopic direct vision to ex- pose the plate and screws, the internal fixation device was completely removed. [Results] One month after surgery, the patients got signifi- cant improvement in terms of range of motion and the function, with flexion of 140 degrees, extension of 45 degrees, external rotation of 70 degrees, internal rotation of 60 degrees, abduction of 150 degrees, and UCLA score of 32. [Conclusion] The arthroscopic release and im- plant removal are simple, minimally invasive and effective for previous open reduction and internal fixation of proximal humeral fractures with satisfactory clinical results.