Objective: Adolescence is one of third critical period of life with a variety of developmental changes. Adolescence Reproductive Heath (R.H) has key role in providing the their health. Objective: The aims of this paper are to studying the educational needs of adolescent toward Reproductive Health and determination effective strategies to educate them. Materials and Methods: This Cross sectional study conducted on 300 teenagers girl in 6 schools of Qazvin (randomly selected) in 2005.Data was analyzd by Chi-square tast and T.test . Results: Average scale of knowledge about exercise and nutrition were 29, anatomy 11, reproductive physiology 13, menstruation 36, puberty heath 35, breast cancer 15, AIDS & STDs 60, family planning methods 27. Conclusion: In order to results of this study, knowledge of is quite weak. Therefor R.H education via schools midwifes, mothers, teachers, friends, etc in adolescent age group is considering.