Sexual harassment is all kinds of behavior that leads to sexual things that are carried out unilaterally and are not expected by the person who is the target, causing negative reactions such as shame, anger, hatred, offence, and so on in individuals who are victims of harassment. This study uses a descriptive design that aims to describe the coping mechanisms of adolescents at SMK Negeri 1 Medan against sexual harassment. The sample in this study were 94 teenagers at SMK Negeri 1 Medan. Sampling using the Stratified proportional random sampling method. The results showed that the adolescent's coping mechanism against sexual harassment was adaptive (n=78;83%). Adolescents used problem-focused coping mechanisms (n=61; 65%) and using coping mechanisms that focus on emotions (n=33;35%). Adolescents at SMK Negeri 1 Medan use adaptive coping mechanisms to the problem of sexual harassment. Based on the results of the research, it is hoped that the education office and the school can work together with health workers to provide counseling regarding the problem of sexual harassment and efforts to deal with the problem of sexual harassment in adolescents. So that acts of sexual harassment can be faced by adolescents with adaptive coping and can reduce the incidence of sexual harassment in adolescents. Based on the results of the research, it is hoped that the education office and the school can work together with health workers to provide counseling regarding the problem of sexual harassment and efforts to deal with the problem of sexual harassment in adolescents. So that acts of sexual harassment can be faced by adolescents with adaptive coping and can reduce the incidence of sexual harassment in adolescents. Based on the results of the research, it is hoped that the education office and the school can work together with health workers to provide counseling regarding the problem of sexual harassment and efforts to deal with the problem of sexual harassment in adolescents. So that acts of sexual harassment can be faced by adolescents with adaptive coping and can reduce the incidence of sexual harassment in adolescents.