Purpose of this study was to determine the effect of crude oil prices, inflation, and interest rates towards the composite stock price index on the Indonesia Stock Exchange (IDX). The sample used in this study is a saturated sample of time data series monthly during January 2013 - August 2018 periods which generated as much as 68 samples and the analysis method used is the multiple linear regression analysis. The results of the analysis showed that crude oil prices do not affect the Composite Stock Price Index in the IDX, while the inflation and interest rates variables negatively affect the composite stock price index on the IDX.