Juveniles are those who are below the age of 18 or also termed as minors. Those criminal offenders who are minor, are termed as a juvenile. As juveniles are considered to be of light age and tender in nature and that they can be rehabilitated if given a chance and hence sections of Indian Penal Code and Criminal Procedure Code does not apply on them. For the rehabilitation of such juveniles are given punishment according to the gravity of the crime committed and their mental element. In this paper, various factors affecting, types and causes behind juvenile delinquency have been discussed. Among various types of juvenile delinquency, there are minor violations, major violations, property violations, bodily harm addiction etc. Various acts as per the juveniles have been commenced which played an important role in juvenile justice. These acts are- Juvenile Justice Act, 1986, JJ Act, 2000, JJ Act, 2001, JJ Act, 2014, JJ Act, 2015. These acts have been enforced for the protection of juveniles and also for deciding their sentence accordingly, keeping in mind their age and gravity of the crime committed by them.