Objectives: To evaluate undergraduate medical education in Korea, we aimed at the development of the students satisfaction questionnaire. Also analysis of the factors affecting student satisfa ction was intended. Subjects: Total students of 33 medical schools in whole country were included as a target population. However, finally 5,452 students from 25 schools participated in the survey. Method: We developed the questionnaire, asking student satisfaction for six categories of medical education in terms of educational input and process; educator, facility, educational environments. Each school administered questionnaire to their students, and responses with the angle of the distribution of the satisfaction and the factors affecting the satisfaction were analysed by the authors. Results: Overall satisfaction of students was not so high. The older the school, and the larger the students number, the higher the satisfaction level of the students. Students who live in the dormitory were more satisfied with medical education than those live alone. There was no significant correlation between satisfaction level and individual factors of the students such as sex, academic performance level, etc. Conclusion: It is necessary to develop continuous program that evaluate and improve the quality of medical education. Among them measurement in student satisfaction may be one of the useful.