This research aims to analyze and determine the effect of the Rupiah exchange rate, interest rate, Composite Stock Price Index on financial deepening in Indonesia. This research used time series data consisting of rupiah exchange rate, interest rates, Composite stock Price Index and financial deepening in quarterly during the period of 2010-2018. This research used descriptive quantitative method. Technique of analysis in this research is descriptive qualitative. The results of this research indicate that the rupiah exchange rate, interest rate and Composite Stock Price Index have effect to financial deepening in Indonesia.