This study aims to test empirically the impact of implementation good corporate governance on the market value of firms. The Good Corporate Governance Perception Index (IICG) used in this study developed by KNKCGI (2001). Moreover, this study also investigated whether investors also consider other Good Corporate Governance variables. This study examines twenty-eight companies that implemented Good Corporate Governance in Jakarta Stocks Exchange during 2001 to 2002. Regression model analysis is used to identify the effect implementation Good Corporate Governance on market value of firm. The result show that there are no positively impact to implementation Good Corporate Governance with market value of firms.