background:adolsence is begining concerns chenging in physical,mental,social and  personal or distress on health related issues is an important component of anexity in adolsencets,concern in this period can continue to adulhood,this study aimed to determine the impact of group discussion on adolescent health concerns in girls 15-18years old  in zanjan city in 2016Material and method: this experimental study was performed on 80 girls 18-15 years old in Zanjan city who were randomly selected. Participants were divided in two groups: intervention and control. Data were collected with demographic and health concern questionnaire. Before intervention pre-test and immediately and 4weeks after intervention poste-test was performed for both groups. Data were analyzed with spss 17.Results: The results showed that after intervention group discussion adolescents' health concerns were reduced. In  personal health and nutrition dimention only concerns before and four weeks after intervention were significantly reduced (p<0.05) but in environment , health care , disorders , Control and Prevention injuries , public health , communications , emotional health , the future of the concerns before test immediately and 4 weeks after intervention were reduced(p<0.05)Conclusion: Due to the specific characteristics of adolescence and the important role of this period in adult life, education intervention programs in the field of health concerns in different ways and with the direct involvement of youth and a friendly group discussions for reducing adolescents' health concerns are recommended.