Islamic banks were created as an Islamic alternative to traditional banks. Hence, the existence of legitimate oversight is considered necessary to Islamic banks. The importance of Shari'ah control is related to its role in a legitimate banking provisions, and ensuring the Bank's commitment, to ensure all transactions are in accordance with the Islamic Shari'ah, and thus ensures the integrity and credibility of Islamic banks. From these importance, this research deals with the Shari'ah control in Islamic banking and its role in evaluating the performance according to the Shari'ah. The concept of Shari'ah control, its structure, stages, and problems were studied. Then the Shari'ah control in Syria and its role in adjust the performance of Islamic banks was evaluated by a set of appropriate standards. At the end, the research drew a set of conclusions and recommendations. One of the most important conclusions is that, the Shari'ah control board in Islamic banks in Syria has many features that enable them to perform its role in controlling and evaluating the work of the Islamic banks in terms of Shari'ah. Through the form and composition of the Commission, having a degree of administrative and financial autonomy, mandatory resolutions, and the nature of the tasks entrusted to it. As a result, Shari'ah control boards in Islamic banks in Syria are considered to be in line with their goal of ensuring full adherence to Islamic Shari'ah. One of the most important recommendations is that, working to avoid shortcomings and deficiencies, providing more features and requirements for activation of Shari'ah control, and enabling it to adjust and correct performance of the Islamic banks.