A Statistical analysis on 781 operated case (691 Admitted patients) at our clinic during the period of 1 year from Aug- 75 to July 76. The following results were obtained. 1. The admission rate was 5.1 percent and operate 4.9 percent of total patients. 2. The highest incidence in age distribution was the second decade (52%) and followed by the third decade (19%) and sex distribution was higher in mald (53%) than female (47%) with an ratio 1.4 to 1. 3. The highest incidence was observed in Feb. in monthly distribution and winter in the seasonal distribution. 4. The operation distribution was as follow : Head and Neck op. 200 cases (25%) : Otologic op. 131 cases (16%) : Plastic and reconstructive op. 60 cases (7.5%) : Endoscopic op. 105 cases (13.1%) : General op. 304 cases (38%). a : The most frequent op. in Head and Neck field was tracheotomy (34 cases) and followed by Neck node biopsy (28 cases). b : The most frequent op. in otologic field was tympanoplasty and Mastoidectomy (116 cases) and repair of cleft palate (15 cases). c : The most frequent op. in plastic and reconstructive field was tracheoplasty (15 cases) and repair of cleft palate (15 cases). d : The most frequent op. in endoscopic field was laryngoscopy (61 cases) and followed by the Esophagoscopy (42 cases). e : The most frequent op. in General field was Antrostomy (112 cases).