This paper aimed to examine the relationship between purpose, self-concept and problematic behavior in adolescents. However, we know about purpose is a central life aim that organizes and guides behaviors and linked to positive outcome of development, there is a little acknowledge about mutual connection among it to levels of self-concept and effects of this relation on behavior. Associations between purpose, self-concept and behavior were examined in a sample of 115 adolescent in the high school (Mean age 17.58 years; SD 0.48). Hierarchical linear regression examined effects of self-concept and purposefulness as a predictor of healthy behavior. Results revealed that self-concept moderated the association between purposefulness and healthier behavior in adolescents. Adolescents with high level of self-concept reported greater commitment to purpose and show the adaptable behavior in family and school. Implications of the findings are discussed.

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