Corporate governance is a set of relationships between shareholders, managers, and auditors of companies and institutions, which includes establishing a control system to ensure that shareholder rights are partially implemented and that the Board approves and properly abuses them. The law, which is based on the social responsibility and accountability system, is a set of duties and responsibilities that must be fulfilled by the pillars of the company to ensure accountability and transparency. Attempts to achieve this need to be undertaken by various studies and the impact of this important indicator on the performance of corporations and institutions should be tested. Banks are one of the institutions where corporate governance can be more effective and relevant. Therefore, it is necessary to examine this index on the performance of banks. With this in mind, this study attempts to investigate the impact of corporate governance on the performance index of banks affiliated to Tehran Stock Exchange from 2009 to 2016 using panel data method. The results show that the ratio of the number of non-performing directors to the total number of directors, the bank's capital and the position of CEO, and the head of the board of directors have a positive and significant effect, and the financial leverage index has a negative and significant effect. Banks' performance indexes are listed on the Tehran Stock Exchange.