This study aims to examine the effects of faith maturity on self-esteem and interpersonal relationship with the focus on middle school students. The subjects of this research were 506 male and female middle school students of 10 churches in the D and G region. The data were analyzed by descriptive statistics, frequency analysis, multiple regression analysis, percentage, correlation, using a statistical program SPSS WIN 18.0. The results of this study were as follows. First, there were partially significant differences according to the level of faith maturity, self-esteem, interpersonal relationship, in terms of the characteristics of social population studies. Second, the result of the examination between sense of faith maturity and self-esteem and interpersonal relationship was as following. Sense of faith maturity was shown to have a significant and proportional relationship with self-esteem. This result signifies that the higher the sense of faith maturity, the higher the self-esteem. Sense of faith maturity also had a statistically significant positive correlation with the interpersonal relationship. Third, Sense of faith maturity had a statistically significant positive correlation with self-esteem. Sense of faith maturity was shown to have a significant and proportional relationship with self-esteem. Forth, Sense of faith maturity had a statistically significant positive correlation with interpersonal relationship. Finally, examining the effect of sense of faith maturity on self-esteem and interpersonal relationship yielded a result as following.