The main objective of the study is to examine the roles of regulatory bodies in the capital market development in Nigeria with special reference to Security and Exchange Commission and, also, the in-depth analysis of the operations of the Nigerian Capital Market. The findings made from data obtained during the course of the research work. The discussion was obtained from internet searched and relevant textbooks. Through the research, it is clearly showed that capital market has contributed immensely to the development of Nigeria economy but encountered some problems. However, certain recommendation were made to the regulatory authorities on how to remove some impediments that tends to hinder the growth and performance of this market with a view of stabilizing and inducing suitable growth of Capital Market.