The research aimed to measure the impact of the application of the quality management system according to ISO 9001 standards on customer satisfaction in the banking sector, and the goal of this measurement is to discover how the customers perceive the benefits of quality management system, It also aims to discover the strengths and weaknesses of the application of this system to enhance the strengths and treat the weaknesses, and to make continuous improvement for the quality management system. In addition to this to work on developing the customer confidence in the services that are provided by the Bank.