The purpose of this thesis is to capture to framework of corporate governance by examining its origin. The large sized corporation has recently grown up to a point far beyond the control of a national state. Any crises that occurred in the financial sector would initiate a tremendous damages to the entire economy. Under such a circumstances, how to strengthening has became the best cure to fight against the crises. Information disclosure are among the most important issues involved in the subject of corporate governance. We address the importance of information disclosure in corporate governance in general, and its role in improving corporate performances in particular.