Case report: Posterior subtalar dislocations are extremely rare injuries which are caused by high energy trauma, which is generally managed by closed reduction, if present early. We present such a rare case of neglected posterior subtalar dislocation, which was successfully treated with open reduction. For satisfactory outcome, early diagnosis, anatomical reduction, stable fixation of peritalar joint, and the resection of small, free osteochondral fragments for the prevention of early posttraumatic arthrosis, is necessary.