Aim: To determine the beliefs of students studying in the field of health, who may encounter individuals with mental illness during their education and professional life, about mental illnesses, the relationship between these beliefs and personality types, and to guide intervention studies. Method: The sample of the descriptive study included nutrition and dietetics, social work, health management, audiology and nursing students studying at a state university (n=491). Personal Information Form, Belief Scale for Mental Illnesses, and Type A and B Personality Questionnaires were used for data collection tools. The analysis of the obtained data was done by using SPSS 20.0 program, number and percentage distribution, frequency, student t test, one-way ANOVA test. The statistical significance limit was accepted as p<0.05. Results: 42.2% of the students participating in the study had type A personality and 57.8% had type B personality. The total score of the students’ belief in mental illness was 45.7±15.1, the Dangerousness Subscale total score was 13.6±4.3, the Helplessness and Interpersonal Skills Subscale total score was 23.2±9.4, and the Shame subscale score was 1.1±1.9. It was determined that there was a significant correlation between the students’ total scores on the Beliefs towards Mental Illness Scale and their personality types (p<.000). Accordingly, individuals with type B personality traits were found to have lower scores (42.0±14.3) on the Beliefs on Mental Illness Scale than individuals with type A personality traits (50.7±14.7). Discussion and Conclusion: According to the results of the research, it was determined that individuals with type A personality traits have more negative beliefs about mental illnesses than individuals with type B personality traits. In connection with our research, it was seen that the correlation between personality types and beliefs about mental illnesses had not been examined before in the literature. For this reason, our research is important in terms of contributing to the literature with new information. The negative beliefs of the students participating in the study about mental illnesses were below the moderate level (45.7±15.1). It was determined that male students had more negative beliefs about mental illnesses than female students, and those living in rural areas had more negative beliefs than those living in urban areas. In the systematic review of Çam and Bilge, in parallel with our study, it was revealed that individuals living in rural areas in our country tend to have more negative beliefs, attitudes and stigmatization towards mental illnesses compared to individuals living in urban areas [1]. In literature, it is seen that negative beliefs about psychiatric diseases decreased and attitudes changed positively in students who took psychiatric nursing courses [2]. In our study, nursing students got the lowest score from the dangerousness subscale. In our study, it was determined that students whose relatives did not have a psychiatric history had a higher tendency to be ashamed of mental illnesses. When the literature is examined, it has been observed that individuals with mental illness in themselves or in their family/relatives have less negative attitudes towards mental illnesses [3]. Keywords: Stigma, mental illness, personality