OBJECTIVE This study aims to find out the causes of developing delinquent behaviour among male adolescents in Pakistan’s society. METHODS Self-reported modified delinquency scale used to measure the delinquent behaviour among adolescents. Data were collected through the survey research technique with the help of a structured interview schedule. The sample size was selected through quota sampling which consisted of 250 male respondents. RESULTS It founds that, in Pakistan out of 250 male adolescents 82(32.8%) are delinquents, it means out of every 8 adolescents 3 are delinquents. Lower economic status is not closely related to delinquent behaviour. CONCLUSION It is concluded said that peer group motivation, ineffective parent’s and teacher’s practices, access on the internet and mobile phones are influencing delinquent behaviour among adolescents. A model for developing delinquent behaviour lead to organized criminal behaviour is outlined. The study is limited to the size & basic characteristics of respondents. It was very difficult to confess to the respondents about sexual activities. A notable limitation is that the study only focuses on the sociological cause of delinquent behaviour. The future research work may emphasis on psychological and biological factors influencing delinquent behaviour.