The aim of this research is to know what about comparison input values Bank Mandiri and Bank BCA 2011-2015 period, comparison of output values Bank Mandiri and Bank BCA period 2011-2015, and Bank Mandiri and Bank BCA level of efficiency 2011-2015 period. This Research used descriptive method with quantitative approach. The performance measurement of banking efficiency used is by Data Envelopment Analysis (DEA) approach. Sample of research is Bank Mandiri and Bank BCA based on the financial statement year 2011-2015. Through the result of this research obtained evidence that: 1) comparison input values Bank Mandiri and Bank BCA 2011-2015 period, that third parties fund Bank Mandiri superior in amount 315.552.381 than Bank BCA, operating costs Bank Mandiri superior in amount 20.101.608 than Bank BCA, interest costs Bank Mandiri superior in amount 44.636.486 than Bank BCA. 2) comparison output values Bank Mandiri and Bank BCA 2011-2015 period, that loans Bank Mandiri superior in amount 751.202.456 than Bank BCA, interest income Bank Mandiri superior in amount than 178.819.527 Bank BCA, operating income Bank BCA superior in amount than 103.218.049 Bank Mandiri. 3) the value of the efficiency of Bank Mandiri and Bank BCA in the 2011-2015 period has a score of 1 is relatively perfect. In other words, Bank Mandiri and Bank BCA has been working efficiently for five years in a row (2011-2015). This shows no difference in efficiency level of Bank Mandiri and Bank BCA in 2011-2015 period.
Keywords: Bank, Efficiency, DEA