Abstract: This study is surveying some of personality characteristics of adolescents and their associations with academic achievement: Accordingly, 1314 randomly allocated students of Tehran’s high schools were assessed by Beck self-concept inventory, Coopersmith self-esteem inventory, Spielberger State-Trait anxiety inventory, Beck depression inventory. Results indicate that self-concept is correlated with self-esteem and these two have positive impacts on augment of academic achievement. Moreover, the increase of self-concept and self-esteem are related to the decrease of anxiety and a negative significant relation exists between self-concept, self-esteem and depression which will ensue decrease in academic achievement.