This study aimed to determine the professional belief levels of the physical education teacher candidates and the factors affecting their belief levels. Exploratory sequential design, one of the mixed research methods, was used to examine the candidates of the physical education teachers. The quantitative sample of the study consisted of 278 (n=126 female, n=152 male) candidates teachers attending the 1st, 2nd, 3rd and 4th-grade level at the Faculty of Sport Sciences. The qualitative research sample of the study consisted of 12 physical education teacher candidates who participated in two different focus group interviews. In the quantitative part of the study, while the independent sample t-test was used in the analysis of the gender variable, One-way ANOVA test was used to determine the difference between the grade levels. In the qualitative part of the study, content analysis was used. While there was no significant difference in the "sense of calling" and the "value of physical education" according to gender, there was a statistical difference according to the grade level of the candidate teachers. In the qualitative part of the study, as a result of the focus group interviews, two themes and twelve categories were determined as the reasons that affect the belief levels of the candidate teachers of physical education positively and the reasons that affect them negatively. It was derived from the study that candidate teachers state that their motivation, attitude, and beliefs towards the teaching profession after starting their departments gradually decreased and started to evolve negatively after starting the department. Teacher candidates state the reasons of their negative opinion as "disappointment caused by the department", "insufficient salary", "counting on the spot (make no progress)", "negative physical education teacher perception in the society", "working conditions", "insufficient field education" and "difficulty in appointment to the job".