This  study  was  conducted  to  analyze  the  effect  of  corporate  governance mechanisms, (Ownership Concentration, Size of the Board of Commissioners, Board  Size,  Komisarin  Independent Audit  Committee,  Debt  Policy  and  Firm Size) on financial performance. This research was conducted on a manufacturing company in Indonesia Stock Exchange. The population in this study amounted to 148 companies manufacturing and samples were taken of 20 companies with a passing stage purposive sampling. The data used in this research is secondary data. Data taken from the companies listed  in  Indonesia  Stock  Exchange  in  2010-2012  were  obtained  from  the Indonesian  Capital  Market  Director  (ICMD).  Data  collection  techniques using methods of documentation and analysis techniques using multiple linear regression model. Based on the results of hypothesis testing is known that the variable size of the board  of  directors,  audit  committee  and  manufacturing  company  size  has  no effect on CFROA on manufacturing companies in Indonesia Stock Exchange. Sementra  independent  commissioner  terhdap  CFROA  significant  negative effect on manufacturing companies in Indonesia Stock Exchange. Means that the more the number of independent komasaris sekamin lowering CFROA and vice versa. Variable concentration of ownership, board size and debt policies CFROA significant positive effect on the manufacturing company in Indonesia Stock Exchange Keywords: Corporate Governance Mechanisms, CFROA, Ownership Concentration, Size BOC, Size Independent Commissioner Board, Audit Committee, Debt Policy, Company Size