The importance of quality education in nation building cannot be over emphasized. There have been several calls on the educational managers on how to make the educational system to be more vibrant in the quality of its products after several quantity of mass failure and half baked products from our various educational institutions in the country. These over the years have generated a lot of debate and argument among Nigerians on the newspapers, radio and television programmed, including parent's religious bodies and non governmental organizations. They often expressed their concern about the manner in which the system is loosing its confidence as regards to the effective and efficient nature of the system. However, this paper therefore, discusses the role of educational managers in assuring quality in the Nigerian education system. Consequently, the paper looks at the concept of quality assurance and strategies for establishing quality assurance in education and finally it also examines Educational managers' role in assuring quality in Nigeria education system. (Contains 2 tables.)