The research on Foreign Exchange BUSN is aimed at knowing the effect of CAR, LDR, NPL and NIM on ROA in Devisa National Public Private Banks Registered On The IDX 2013-2017 Period. The type of research used is associative research . Using quantitative methods. The population in this study is BUSN consists of 26 Banks. The sampling technique for research uses a purposive sampling method. The number of recognized research samples is 7 bank sample. The data analysis method used is descriptive

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... stics, multiple linear regression analysis and classical assumption tests. Testing the hypothesis used is the statistical test t and F statistical test. The results showed that partially CAR had a non-significant negative effect on ROA, LDR has no significant positive effect on ROA, NPL has a significant negative effect on ROA, and NIM has a significant positive effect on ROA. In addition, the results of the CAR, LDR, NPL and NIM studies simultaneously influence ROA.