Abstract: The development of human behavior is a complex on going process and is governed by many interrelating factors which stems from both human and non-human element. Debates in Malaysia regarding this issue have centered on how, first, media is the most dominant contributing factor and it plays a significant role in the development of human behavior and second, on the fact that its influence are mostly negative leading to the increase of ill-mannered young individuals in the country which is judged by the statistics of crime rates and social problems. However, studies from various sources state that the most influential factor in behavior development is actually peer relation. This research note affirms the claim by enlightening readers about the fundamentals of social learning factors with greater emphasis on peer influence. The dimension of peer relation was depicted in great details to better understand its immense power and how it can influence the development of human behavior. Case studies from previous researches were used as the main instrument in this research note while trend observations and review of past literatures were done to support statements and to draw conclusions. Evidence exists that negative emotions and anxiety play a role in peer influence, particularly feelings of inadequacy and isolation. As the case-studies reveal, the relationship between peer pressure and human behavior development is complex. The dimension of peer relation was explored in this study.