Objective: This research is a descriptive field study, conducted in order to investigate the relationship between attachment style and mental health in adolescence and was to evaluate the effects of parent's attitude on attachment style. Methods: Sociodemographic data form, Strength and Difficulties Questionnaire, Relationship Scale Questionnaire was applied to 384 adolescents, between 11-15 years through face to face interviews. The mental capacity of all participants was sufficient enough to maintain the interviews. The parents of all adolescence provided informed consent before the initation of the study. Sociodemographic DataForm, Parental Attitude Research Instrument was applied to adolescence's parents. Results: There was negative correlations between secure attachment style and prosocial behavior, emotional symptoms, hyperactivity/inattention, peer relationship problems, conduct problems, total difficulties scores, whereas there was a positive correlation between fearful attachment style and emotional symptoms, total difficulties scores. Significant positive correlations have been found between dismissed attachment style and emotional symptoms, hyperactivity/inattention, prosocial behavior, total difficulties scores. Also there was a significant positive correlation between fearful attachment style and oppression and discipline subscales of The Parental Attitude Research Instrument scale and a negative correlation between dismissed attachment style and overeager mother, egalitarianism and democratic attitude subscales. Discussion: The implementation of therapeutic, structured mental support program to adolescences with attachment problems and their families could be beneficial im improving mental status of these individuals.