Objective: The objective is to determine the degree of stigmatization of people with mental illness in the Clinical Social Worker students. Design: Pilot study. Participants: 32 students of College of Polytechnics Jihlava.12 students were taught with and 20 without peer lecturers. Methods: Stigmatization was measured by the RIBS questionnaire. An additional question focused on work with clients with a psychiatric illness. The data were processed in MS Excel and IBM SPSS Statistics 22. For comparing the probability distribution of categorical variables the chi square goodness of fit test and semantic differential were used. Results: It is not possible to clearly describe statistically significant differences between the groups. However, it is evident that lessons with peer lecturers reduce stigmatization. Conclusion: Instruction with peer lecturers has been justified. Destigmatization-oriented teaching and further research into the stigmatization of the mentally ill will continue.