Objective: The aims of this study are to determine whether there are differences in opinions of bulimia nervosa, risk factors, early detection and treatment possibilities, character traits of a sufferer between second semester and sixth semester undergraduate nursing students, as well as differences between those that know an bulimia nervosa sufferer personally and those that have never met such a person. Organisation of the study: The study is structured as a cross-sectional study. Subjects and methods: 84 subjects, of which 24 subjects were second semester students and 60 were sixth semester undergraduate nursing students in the academic year of 2016/2017, were subjected to this study on the premises of Medicinski fakultet Osijek. The chosen method was a questionnaire comprised of questions regarding the subject's age, sex and attending semester, ten multiple choice questions regarding knowledge concerning bulimia nervosa, one question regarding whether the subject knows a person suffering from bulimia nervosa personally, and ten claims which the subject graded on a Likert's scale of 1 - 5. These claims referred to character traits of an bulimia nervosa and they were used to estimate do they have prejudice towards them. Results: Seven questions regarding knowledge of ten were answered correctly. Significant statistical differences regarding knowledge were not found, whether based on semester attendancy or knowing a sufferer or not. Significant statistical differences weren't found either in opinions of sufferers, based on semester attendancy, or whether the subjects know a sufferer personally or not. Conclusion: The knowledge of students was poor, they have elementary level of knowledge, but the needs are bigger and they will have to work on their development.