The purpose of this study was to identify a causal model for professionalism and turnover intention among leisure sports instructors using Structural Equation Modeling (SEM). The leisure sports instructors were recruited from sports centers in the Seoul metropolitan area, including Gyeonggido and Incheon, by using a convenience sampling method. A total 482 questionnaires were collected, and of those, 422 were used; 60 untruthful questionnaires were excluded. The data were recorded and analyzed using SPSS Win ver. 18. The AMOS 7.0 statistical computer package was used to do an exploratory factor analysis (EFA), confirmatory factor analysis (CFA), and structural equation modeling (SEM). According to the demographic variables of the leisure sport instructors, only the autonomy among four different variables of professionalism in the female instructors was significantly higher than that of the male instructors (P<.05). In addition, there were significant differences in the self-regulation and the flow of the professionalism, depending on the age and work experience level. There was a significant difference in turnover intention for gender (P<.05); the turnover intention in the male instructors were higher than that in the female instructors. The findings of the current study indicates that the research model with structural equation modeling (SEM) fits the five path variables including professionalism, job embeddedness, job burnout, and turnover intention. Moreover, the five research hypotheses were accepted and its results are the following. First, there was a significant causal relationship between professionalism and job embeddedness. This result indicates that job embeddedness increases as professionalism increases. Second, professionalism significantly influences job burnout. Instructors experience less job burnout with higher professionalism. Third, job embeddedness has a significant influence on job burnout. This means job burnout decreases as job embeddedness increases. Forth, job embeddedness significantly influences turnover intention. Instructors have less turnover intention as job embeddedness increases. Fifth, job burnout has a significant influence on turnover intention. This indicates turnover intention increases as job burnout increases.