The voice rehabilitation of 43 laryngectomized patients were performed with endoscopic tracheoesophageal fistulation for interposition of ducks bill silicone tube from 1986 to 1993. 12 cases were performed from 1986 to 1989. Voice rehabilitated in 7 cases (58.3%). 31 cases were performed from 1989 to 1993, of which 29 cases (93.3%) obtained voice successfully with criconphageal myotomy cricoid chondredomy and test of esophageal speech flowing during operation.