Neglected shoulder dislocation may be accompanied by pathological changes in bony and soft tissue structure. Therefore, requires extensive surgical procedure. There is no standard treatment protocol to overcome this case and it is still a challenging case. Presentation of case: We presented a 46–year–old male patient with deformity on his left shoulder. The patient has neglected anterior shoulder dislocation from 6 month with a Hill–Sachs lesion. Treatment was open reduction combined with Latarjet procedure. Evaluation of treatment was performed followed by surgery. Discussion: Neglected shoulder dislocation, especially with significant bony defects, is challenging and not be managed with standard surgical technique because of severe soft–tissue contracture and bone deficiency. Chronic anterior shoulder dislocation is a difficult condition for both patient and clinician. In addition, the treatment results can be unsatisfactory. Latarjet procedure has been shown to be effective for the treatment of recurrent anterior shoulder dislocation with a large glenoid defect which might justify the application of this procedure for the treatment of neglected anterior shoulder dislocation. Conclusion: Open Latarjet procedure performed for treatment of neglected anterior shoulder dislocation have a high rate of successful in preventing further dislocation of the shoulder joint although the high risk of osteoarthritis of the shoulder joint can still persist.