Student union is always controversial matter for the Indian Universities.Student union usually focusing on providing students with facilities, support, and services. The present research attempts to explore the potential background of student Union in different countries and view of students about Student Union in Banaras Hindu University. In this analysis a comparison between Student Union and Student council has also done in the sense of its advantages and disadvantages. This analysis is done on the real data collected by the author and using statistical test and many other effects of the Student union on environment of university have shown in this research.