When tracheal injury occurs during esophagectomy, it is a very serious and frequently fatal complication. We experienced a case of intractable tracheomediastinal fi stula caused by tracheal injury during esophagectomy that was successfully repaired using a pedicle fl ap of the left pectoralis major muscle. A 55-year-old Japanese man who had congenital right aortic arch was referred to our hospital with a complaint of dysphagia. He had a type 2 carcinoma from the distal part of the cervical esophagus to the upper thoracic esophagus, 4.5 cm in length and attached to the membranous wall of the trachea. Subtotal esophagectomy was performed with left thoracotomy. The tumor adhered tightly to the membranous portion of the trachea, and the trachea was injured during removal of the tumor. The laceration was directly sutured and covered with a latissimus dorsi muscle fl ap. However, a tracheomediastinal fi stula became enlarged and the left subclavian artery became exposed. Repair of the fi stula was performed 31 days after the fi rst operation: a permanent tracheotomy was made, laryngectomy was performed, and the fi stula was fi lled with a pedicle fl ap of the pectoralis major muscle. The postoperative course was uneventful and the patient's general condition improved. The use of a pectoralis major muscle fl ap was effective for repairing the tracheomediastinal fi stula.