摘要:Purpose:The purpose of this study is to investigate the trends and traits of moral sensitivity and reasoning over six years of medical school. Methods:The participants in this study consisted of 217 first to sixth-year medical students of Sungkyunkwan University School of Medicine in Korea. Essay type questionnaire was used for evaluating moral sensitivity and the Korean-Defining Issues Test (KDIT) was used for evaluating moral reasoning. Results:It was found that the medical students’ sensitivity of 'public welfare’,'prospective result’ and 'role-taking as a doctor’ was significantly higher than that of the pre-medical students’. Moral sensitivity increased in the 3rd and the 4th years but decreased in the 5th and the 6 th years. Moral reasoning decreased in the 3rd and the 4th years but increased in the 5th and the 6 th years. No correlation was observed between moral sensitivity and reasoning (r=0.033). Developmental trends of moral sensitivity and reasoning showed a significant difference in terms of year of medical school. Conclusion:The results suggest that medical school curriculum tends to impct students' moral sensitivity. This school has implemented the problem-based learning curriculum into the 3rd and the 4th years. It is necessary to consider the developmental state of the student’s morality when developing an effective medical ethics program.