This study aims to determine the effect of Ownership Structure and Good Corporate Governance on the Banks Performance. In this study the Ownership Structure is represented by the percentage of institutional ownership, while Good Corporate Governance in this study uses a proxy index of CGPI and Board of Directors uses proxy the number of directors. The population in this study are banking companies that issued their financial report and GCG report in 2010­2014. With purposive sampling techniques, it obtain 46 companies as samples. Multiple regression is used to test the hypotheses. The results of this study indicate that GCG and Board of Directors has positive significant effect on bank performance, while institutional ownership is not proved to have a significant effect of bank performance. 
Keywords: Bank Performance, GCG, CGPI, Institutional ownership, Board Size.