This study was conducted to investigate how adolescent's smart phone addiction affect psychological mindedness. In order to achieve the purpose of this study, Jeonju-si and Jeollabuk-do adolescent's enrolled in a survey. t-test, one-way ANOVA, correlation analysis and regression analysis was performed by using SPSS program. The result of this study is that adolescent's smart phone addiction affect on psychological mindedness significantly. Smartphone addiction had a significant influence on psychological mindedness in negative way. The results of this study of adolescent's addicted to smartphones with a greater understanding of material will be important to broaden adolescent's is desirable to recognize the direction of smartphones will be able to provide that opportunity.