An analysis has been made of two hundred seven patients who were treated at the department of Radiation Oncology of Korea University Hospital for lung cancer from January 1981 through December 1986. There were 137 patients of nonsmall cell carcinoma (137/207, 66%), 26 patients of small cell carcinoma (26/207, 12.5%) and 44 patients of unproven histology, By aims of treatment, there were 104 patients (104/207, 50%) treated for cure, 89 patients (89/207, 42.9%) for palliation and 14 patients teated postoperatively. In 22 out of 207 patients, chemotherapy was done with radiotherapy, 12 of which were patients with small cell carcinoma. Stage II patients were 49(49/207, 23.6%), stage III patients were 157(157/207, 75.8%) and one patient had an occult cancer. The tumor was initially measured by CAT scan and chest X-rays in the 165 (165/207, 79.7%)patients, among which 117 patients had tumor diameter more than 5cm and 48 patients less than 5cm. Radiation therapy was given with Cobalt 60 teletherapy unit and the treatment volume encompassed primary tumor and the mediastinum. For curative aim, daily tumor dose of 180 cGy was given up to the range of 5,400~6,120 cGy/30~34 F/6~7 week period and for palliative aim, daily tumor dose of 300 cGy was given up to the range of 3,600 ~ 4,500 cGy/12~15 F/2~3 week period.