Two surgical procedures for improvement of tubal function were experimentally tested and applied to patients with severe tubal dysfunction, such as stenosis or patency of the tube. By electrical muscle stimulation, it was found that in dogs, a procedure of cutting the tensor veli palatini muscle; the most important muscle for tubal opening, produced consistent tubal obstruction, while shortening the tensor muscle by suturing it around the hamular process resulted in a consistent increase in tubal patency. These procedures were utilized in cases of 5 patients with severe tubal disturbance, and postoperativelythese patients were followed-up utilizing tubo-tympano-aerodynamic gram and tympanogram. All patients with an abnormal tubal patency showed immediate relief but no long-lasting effect, indicating the unsatisfactory result of this procedure for clinical application. In one patient with the obstructive tube, gradual improvement to nearly normal function was noted one month after the surgery.