The application of the endoscope to the treatment of gunshot wounds has never been reported to our knowledge, with the exception of the laparoscope and the sigmoidscope in abdominal gunshot wounds. We report a patient with a subcutaneous gunshot wound who was treated endoscopically using the irrigation technique. The patient was a 25-year-old man who had been shot in the upper arm. The bullet was found near the thoracic spine via radiograph. At surgery the endoscope was inserted into the wound and irrigation was started. Excellent views could be obtained by irrigation, and the endoscope was advanced along the path of the bullet. The bullet and several fragments were removed with two additional small incisions. The method described herein seems beneficial in that (1) it is less invasive than conventional surgical debridement with a long incision, (2) it may provide information helpful in diagnosing the condition and the location of the bullet and its path, and (3) saline irrigation may have a cleansing effect.