The research aimed at finding out the influence of rupiah exchange rate and BI rate towards JII index and LQ45 index. Besides, it also at finding out the difference of the influence given by rupiah exchange rate and BI rate towards JII index and LQ45 index. The research was quantitative in nature using data of time series during 2008 to 2015. Data analysis used was double linear regression analysis and chow test. The result of the research concluded that rupiah exchange rate and BI rate simultaneously had significant influence towards JII index and LQ45 index. Meanwhile, rupiah exchange rate partially had positive and significant influence towards JII index and LQ45 index, and BI rate had negative and significant influence towards JII index and LQ45 index. Then, the result of chow test showed that there was difference between JII index and LQ45 index if seen from rupiah exchange rate variable and BI rate.