This paper proposes a frame to analysis conceptions of justice in education. This framework can be very useful to identify conceptions about justice in educational discourses. It is a good example of its heuristic interest. In this way, it will be possible to produce a transfer of the design of different educational systems and deduce probable consequences, or also to identify in the name of what the conception of the education policy about justice is criticized or defended. After the presentation of the respective work of the two authors of this article, based on the theories of justice, three models of analysis of educational equity are discussed: Demeuse and Baye (2005), Bolívar (2005) and Espinoza (2007). Finally we propose a new model to overcome the weak points identified in previous models
