Group guidance services, activities, and group dynamics must be realized to discuss various things that are useful for the development or problem solving of individuals or groups of individuals. This study aims to determine the effect of group guidance services in reducing juvenile delinquency or students at Al-Amin Islamic Vocational School, North Cikarang. This research uses correlational technique survey method. The results of the study based on the value of the results of the hypothesis test, the value of the correlation/relationship (R) was 0.764. From the output, the coefficient of determination (R Square) is 0.583 which implies that the effect of the independent variable on the dependent variable is 58.3%. The calculated F value = 102.246 with a significance level of 0.000 <0.05. This shows that the proposed hypothesis is accepted, which means that the existence of group guidance services has a very significant effect on reducing juvenile delinquency at Al-Amin Islamic Vocational School, North Cikarang.