The adolescent years are a crucial time when people are most susceptible to participating in criminal activities since their brains are still developing throughout this period. Peer influence is believed to encourage teenagers to engage in delinquent behaviour. Juvenile delinquency is a serious social problem that has a significant impact on society and having an adverse effect on the mental health of teenagers. The purpose of this research is to determine that negative peer influence and youth gang involvement anticipate juvenile delinquency. A sample of 276 juvenile delinquents, ages 14 to 18, were included in the study in order to meet the intended goal of the research. Questionnaire method was used for statical analysis. The results give a clear idea about the impact of peer influence on juvenile delinquents