This study aims to analyze the effect of Financing to Deposit Ratio (FDR) on Return On Asset (ROA) in Islamic banks, a subsidiary of BUMN. This research is classified as a descriptive quantitative research. This research was conducted at the Sharia Bank Subsidiaries of BUMN, namely Bank Syariah Mandiri, Bank BRI Syariah, and Bank BNI Syariah. The data used in this study are secondary data obtained from the quarterly financial reports for the 2011-2019 period. Data collection techniques through literature and documentation. The analysis method used in this research is Simple Regression Analysis, Descriptive Test, and Classical Assumption Test. As for the hypothesis test used is the t test and the test of determination (R2).From the results of the analysis, it shows that the FDR condition is in the quite good category. Then for the ROA condition it is in the quite good category. Based on several tests that have been carried out, it is known that FDR does not have a significant effect on ROA. This is evidenced in the results of the Determination Test which shows that the size of the FDR ratio is only able to affect the ROA ratio by 0.005 or 0.5%. This means that FDR has a very weak influence in increasing the ROA of Sharia Banks in BUMN Subsidiaries. This is due to other factors that more influence ROA, such as CAR, NPF, and BOPO.