This study was conducted to investigate the relationship between adolescent s inferiority and self - encouragement. Research problems are as follows. First, what is the relationship between inferiority and self-encouragement of middle and high school students? Second, how does the inferiority of middle and high school students influence self-encouragement? This study is a total of 370 students from B middle school and K high school in Jido city from September 20, 2016 to October 5, 2016. Research instruments are self-encouragement measures used by Noan-young and Jung-min(2007) to measure self-encouragement (cognitive self-encouragement, behavioral self-encouragement, emotional self-encouragement). In addition, we used the measurement tools produced by Kim, Eung-Man(1995) to measure inferiority(physical inferiority, social inferiority, domestic inferiority, academic inferiority). As a result of the study, there was a negative correlation between self-encouragement and inferiority, and the higher the self-encouragement score, the lower the inferiority. Self-encouragement had negative effects on the inferiority of the family, followed by academic, physical, and social inferiority. In other words, there was a correlation between inferiority and self-encouragement of middle and high school students. As such, middle and high school students are mature physically, but emotional yet mature, so encouragement is needed in the process of forming self-identity.