Background: Patients treated for mental disorders are often stigmatized, which affects their quality of life and delays treatment due to fear of it. Research shows that mental health literacy in the population of these patients is relatively low, and it has not been investigated in our country. Aim: The research aims to investigate mental health literacy in patients treated for mental disorders at the Neuropsychiatric Hospital "Dr. Ivan Barbot" Popovača. Methods: Cross-sectional research was conducted in the preparation of the thesis. Patients of theNeuropsychiatric Hospital "Dr. Ivan Barbot" Popovača participated in the research from January to April 2024. Data were collected using a paper questionnaire. The questionnaire contained socio demographic data including age, sex, diagnosis, and duration of treatment for mental disorders and the "Mental Health Literacy Scale" (MHLS), which consists of 35 questions. Results: A total of 154 respondents participated in the research, of which 108 (70.1%) were men and 46 (29.9%) were women. The average age of the subjects is 50.2 years (SD=11.19), and the duration of treatment for mental disorders is from 3 months to 40 years (C = 6). All subjects had more than half the number of points on the MHLS (M = 120.7 and SD = 14.4). There is a statistically significant difference in the number of points between men and women (p= .009), as well as in younger respondents (<50.2 years) and older ones (p= .003). Conclusion: Wrong beliefs and lack of knowledge about mental health affect the reluctance to seek treatment for people with mental disorders. It is important to conduct education about the mental health of the population, including current patients.