Educational justice has constantly been the focus of teaching and training experts. Growth of new philosophical and educational theories has provided the possibility of its realization. Thus; the aim of this article is to investigate the position of educational justice in evolution of teaching and training system based on constructivism. In this study, the researcher has used descriptive-analytical method to investigate educational justice in positivism paradigm of modern world and constructivism paradigm of post-modern world. Results of this study showed that although educational justice in modern society has been realized by utilization of positivism paradigm through universal and generalizable rules and availability of education for all mankind, its deficiency has caused that in postmodern society, utilization of construction paradigm and using the lodgments of criticism theory and giving a special attention to mankind originality and its individual differences as a newborn paradigm in teaching and training, societal pressures and injustices originate from inattention to individual differences decrease. Thus, it seems that evolution of teaching and training system based constructivism, has made educational justice to be realized more than before.