Midline fixation of the bilateral vocal cords occurs on rare occasions. This condition has been described as bilateral abductor or posticus paralysis. However, the term of midline fixation or immobilization in median position is more adequate. During the past 17 years, 32 cases having this condition were seen in our clinic. Surgery for this condition and its functional results were discussed. To relieve dyspnea, Woodman's operation and the widening of anterior glottis operation were performed. On performing laryngoplastic surgery, we have to succeed on the first attempt, using a meticu lous technique. Important points are not to fracture the thyroid or arytenoid cartilage and not to damage the laryngeal mucosa. Postoperatively, the patients' voice remained rather in intelligible condition. Postoperative respiratory function tests showed that improvement of lung volumes exceeded that of ventilation tests with a time factor. There were some discrepancies between the laryngoscopic findings and the results of postoperative respiratory function tests. Midline fixation of the bilateral vocal cords occurs on rare occasions. This condition has been described as bilateral abductor or posticus paralysis. However, the term of midline fixation or immobilization in median position is more adequate. During the past 17 years, 32 cases having this condition were seen in our clinic. Surgery for this condition and its functional results were discussed. To relieve dyspnea, Woodman's operation and the widening of anterior glottis operation were performed. On performing laryngoplastic surgery, we have to succeed on the first attempt, using a meticu lous technique. Important points are not to fracture the thyroid or arytenoid cartilage and not to damage the laryngeal mucosa. Postoperatively, the patients' voice remained rather in intelligible condition. Postoperative respiratory function tests showed that improvement of lung volumes exceeded that of ventilation tests with a time factor. There were some discrepancies between the laryngoscopic findings and the results of postoperative respiratory function tests.