The purpose of this study was to examine the effect of GCG mechanisms, and earnings management on financial performance. From the good corporate governance variables, researchers used proxies to the number of board of directors, institutional ownership, managerial ownership, the proportion of independent board of directors, a number of audit committees. Also revealed the influence of earnings management on financial performance. This study uses a sample of 25 manufacturing companies listed on the Indonesia Stock Exchange by using purposive sampling that is financially published reports between 2012-2016. The method of analysis of this study uses multi-regression and single regression. The results of this study indicate that (1) Board of directors has no effect on earnings management, (2) Institutional ownership does not have a significant positive affect on earnings management, (3) Managerial ownership does not have a meaningful influence on earnings management, (4 ) The presence of the Independent Board of Commissioners has no significant effect on earnings management, (5) The size of the audit committee does not have a having a meaning or purposeaffecton earnings management, (6) Simultaneously GCG are not has a significant influence on earnings management, (7) Earnings management has no significant causal factor on financial performance, and (8) GCG mechanisms and earnings management together affect finance performance.