Ethical attitudes and knowledge of medical ethics of medical students of the Faculty of Medicine in OsijekResearch objectives. To determine ethical attitudes and knowledge of the provisions of the Code of Medical Ethics and Deontology in medical students and the differences in the knowledge of these provisions between students of different years of medical school. Design of the study. A cross-sectional study. Respondents and methods. The research was conducted on 104 respondents who were students of the Faculty of Medicine in Osijek. The students filled out the questionnaire in writing. The questionnaire was compiled by a graduate student in cooperation with her mentor. The questionnaire included descriptions of ethically challenging situations from actual medical practice. Students chose their answers twice. The first time they expressed what was ethical for them, while the second time they chose what they thought was correct and applicable according to the Code of Medical Ethics and Deontology. The answers were choices between two approaches of action. One of them was always correct to apply according to the Code. The obtained data were shown descriptively and statistically processed using adequate tests of differences. The results. In 7 of the 10 situations the majority of the respondents expressed their personal ethical attitude that was concordant to the applicable provision of the Code. In 8 of the 10 situations the majority of the respondents chose the proper provision of the Code. In 6 of the 10 situations their personal ethical attitude differed from the proper provision of the Code. There was no relation between the knowledge of the Code and the year at medical school. Among the years that were the most frequently familiar with the Code, there were not the first two years of the study. Conclusion. The results have shown that the students’ personal ethical attitudes were mostly concordant with the Code, that te majority of the students were familiar with the Code, while their personal attitudes still frequently differed from the Code. Concordance between personal attitudes and the Code was not related to the study year. However, students of the initial years SUMMARY 30 are less familiar with the Code. There is a need for improvement of education in medical ethics at the Faculty of Medicine.