The purpose of this research is to examine the influence of good corporate governance mechanismabout earnings management in companies listed in Indonesian Stock Exchange during 2006 to2010. The independent variables include the size of commissioner board, independent commissionerboard percentage, size of audit committee, and commissioner meeting frequency. The dependent variableis earnings management which is measured by discretionary revenue model (Stubben, 2010).Size of company is used as the control variable in this research. The population of this research is465 samples from companies listed at Indonesian Stock Exchange during 2006 to 2010. The samplingmethod used in this research is purposive sampling method. In addition, the data analysis methodused is regression analysis and descriptive statistics. The result of this research indicates that themechanism of good corporate governance which is represented by the size of commissioner board,independent commissioner board percentage, size of audit committee, and commissioner meeting frequencydo not have any significant impact on earnings management. However, the result shows thatcompany size gave positive influence toward earning management.