An analysis of 50 patients with malignant lymphoma treated by Co-60 teletherapy is presented. Histologicclassification was done as Hodgkin's disease, reticulum cell sarcoma, lymphosarcoma, and giant follicularlymphoma. Treatment scheme was made extended field treatment and adjuvant chemotherapy after determination ofclinical staging. Treatment field was determined using simulator including Waldeyer's ring in case of neckextension, mantle field in case of mediastinum involvement and inverted Y shape in case of pelvic and paraaorticinvolvement. The total tumor dose was set to 5000 to 6000 rads in case of reticulum cell sarcoma, 4000 rads to5000 rads in other cases and treated five times per week with daily fraction dose of 200 rads. Result) 1. The ageincidence was most prevalent in 3rd to 5th decade 2. 33 cases were male and 17 cases were female. 3.Reticulum-cell sarcoma was 42%, Lymphosarcoma 30%, Hodgkin's disease 16%, Giant Follicular lymphoma was 2%. 4.Clinical staging follows as;stage I 44%, stage II, 22%, stage III 24%, state IV 12%. 5. The main symptom waspalpable mass on one side of the neck. 6. The Hb and WBC count was decreased somewhat proportionally relating tothe field sizes and delivered doses. 7. Among 50 patients, dead patient was 16, where longest survival month was29 month who was in stage I and 7 patients was alived more than 1 year. Crude 2 year surval rate was 15.6% and 1year survival rate was 46.8%. 8. The relative longest survival was the one who had received extended fieldtreatment and adjuvant chemotherapy. 9. There was no great difference in survival month between reticulum cellsarcoma and lymphosarcoma. 10. The follow up study rate was 64%.