Inadequate primary treatment of calcaneal fractures frequently results in persistent, residual pain. This can be caused by subtalar arthritis, an increased calcaneal width, and/or calcaneal fibular impingement of the peroneal tendons. Many patients experience multiple disorders simultaneously, requiring a combination of procedures to treat the injury. The purpose of the present study was to evaluate the clinical outcomes of arthroscopic debridement with lateral calcaneal ostectomy for residual pain after a calcaneal fracture. Four feet (4 patients) were treated with arthroscopic debridement and lateral calcaneal ostectomy. The patients were 3 males and 1 female, with a mean age of 55.3 ± 14.1 years. The mean follow-up duration was 33.5 ± 10.5 months postoperatively. Three patients received worker's compensation as a result of their condition. The patients were examined for improvement in pain levels using the numeric pain intensity scale and healing was assessed using the Japanese Society of Surgery of the Foot score. The mean Japanese Society of Surgery of the Foot score improved from 64.5 ± 13.8 preoperatively to 82.5 ± 7.1 postoperatively. The mean postoperative numeric pain intensity scale score was 2.3 ± 1.9. No complications, such as deep infection or problems with wound healing, were observed in any of the patients. The simultaneous use of arthroscopic subtalar debridement and lateral calcaneal ostectomy is a valuable intervention for the treatment of residual pain after a calcaneal fracture in patients who present with increased calcaneal width and mild or no degenerative changes in the subtalar joint.