The study investigated the effect of leisure activities on preventing adolescents` suicide. The article explored why participation of leisure may be used to decrease suicide ideation for understanding the psychological effects such as human relation, vitality, emotion control, curiosity, and positiveness. Data were analyzed personal experiences of suicide ideation during their leisure activity participation by using the grounded theory and oral history method of 14 adolescents. As student felt more stress about schoolwork, they felt more suicidal compulsion and as their self-esteem, peer relation and teacher`s support were higher, their suicidal compulsion was lower. The result revealed that adolescents who had participated in leisure activities were turned out to have higher self-esteem due to disappearing their suicide impulse. Also, the positive leisure activities seems to be neighborhood peer group and to be social organizations.