This study aimed to determine the effect of peer leadership training on suicidal ideation in senior high school teenagers. This study followed a quasi-experimental pretest–posttest design without a control group. We obtained 43 respondents using a purposive sampling technique. An intervention was provided in the form of peer leadership training sessions. Measurements were conducted twice—once pre- and once post-intervention—using the Beck Scale for Suicidal Ideation. The analysis used was the Wilcoxon t-test. Suicidal ideation decreased significantly (p value <0.05) after peer leadership training. Providing peer leadership training could reduce suicidal ideation in adolescents from severe categories into mild ones. Peer leadership training was an effective method for reducing suicidal ideation in adolescents and should be recommended by mental health nurses for adolescents at school.
- peer leadership
- Suicidal ideation