The aim of this paper is to investigate the diffusion of innovation theory in the field of education. To do this, we considered the comprehensive definition of diffusion of innovation theory by focusing on its four essential elements (innovation, communication channels, time, social system). Then, the necessary requirements for spreading innovations (relative advantage, relative compatibility, ease of use, testability, observability), and the people who involved in this matter (innovators, early adopters, early majority, late majority, sceptics) were examined. Then, the impact of innovations on the most important factors of education system (schools, human elements particularly teachers, educational materials and teaching learning methods) has been addressed. Finally, some suggestions for encouraging and accepting educational innovations have been offered.