Transcatheter embolization was done in 15 patients with various diseases at department of radiology, Seoul National University Hospital from September 1978 to July 1983 using absolute ethanol, autologous blood clots and gelfoam particles as embolic agents. The results were as follows; 1. Successful embolizations were done in 14 of 15 cases. (Success rate :93%). 2. Most of complication was postembolization syndrome such as fever, nausea, pain but minimal serious complication was very little. 3. Transcatheter embolization appears to be highly valuable adjuvant therapy in debulking of preoperative and inoperable hypervascular mass or treatment of bleeding from various etiology.