The department of Radiation Oncology at Ewha Womans University is separated from Radiology in December 1999, required the students to comply with the course objectives: 1) study correlation between the oncogenic factors and the biological characteristics of tumor, 2) acquire the basic concepts of Radiobiology and Radiation Physics, and Radiation Oncology. In 2nd year of Medical Graduate School, a unified lecture of Oncology will be composed with Radiation Physics, Radiobiology and, Radiation Oncology. During 3rd and 4th year the clinical practice on Radiation Oncology will be exercised.