Objectives: While not good looking physical appearances and body shape cause teenagers to be stressful, self-respect and good peer relationship can play a mediating role in reducing the stresses caused by physical appearances. The purpose of this study was to investigate the impact of self-respect and peer-relation on appearance stress of middle school students. Methods: Data were collected through structured questionnaire given to 353 students in a middle school that agreed to participate in this study. We confirmed the minimum sample size by correlation analysis using G power 3.1 program. The data were analyzed by using SPSS WINDOW 18.0 program. Results: When peer-relations are high, the self respect rises as well and When stress caused by appearance stress goes up, the self-respect goes down. When the peer-relations rise appearance stress decreases. Appearance stress and peer-relations affected the student`s self-respect. Conclusions: In school, it is needed to have an appropriate stress management about their appearance to increase adolescents` self-respect and various program developments to improve the peer-relation.