Among many adolescents, there is a strong desire for effective communication, but they are often incapable in communicating with others, and this disability is due to a lack of courage skill among adolescents. Therefore, the purpose of this study was to investigate the effect of courage skill on social damages among adolescents. In order to answer the main research question, this study was conducted using an experimental method and pretest-posttest design with control group. For this purpose, in order to identify the high risk adolescents, three subscales of Iranian adolescents' risk-taking scales developed by Zadeh Mohammadi, Ahmad Abadi, Heidari (2011) were conducted among adolescents. After identifying high-risk adolescents, 60 of them who have the highest mean of high-risk behaviors were selected and randomly assigned into two groups of 30. After pre-test run, eight training sessions were held and at one time post-test was performed on the experimental and control groups. Findings and Results: The results of multivariate covariance analysis after examining the assumptions of this test showed that there is a significant difference in the linear combination of dependent variables between the experimental and control groups and 74% of the social damage changes (risky factors of high-risk behaviors) can be explained by the intervention of courage skill training.