Equality is one of the main themes in the discourse of education. People say that the opportunity, process, and result of ``school education`` are to be equally guaranteed to everyone. It is because they believe any differences in the components of school life may result in the aggravation of socioeconomic discrimination. Specially, sociologists in the conflict theory insist that school contributes to reproduction of social inequality. Therefore, they persist that ``educational environment`` in a school or between schools be made even. It is agreeable that men should not be treated unequally in a political or social sense. However, whether the issue of ``inequality`` has really critical meaning in the context of education is still uncertain. Educational sociologists argue that anything that works for attaining goals can be accepted as ``education.`` But, such a functionalistic logic of definition only falls into its own trap of false reasoning. It neither reveals any substance of education as a whole, nor verifies it. In this paper, I explained why a functionalistic view of education meets with problems of conceptualizing ``educational environments`` in its argument of realizing ``educational equality``. I made a critical talk at three points: 1) functionalists fail to give a valid sense of educational environment unless they tell education from the other realms of life as its environment, 2) to make ``education environment`` equal wouldn`t be possible with problems in attaining all the goals they accept from outside and in getting methods controllable of every environment, and 3) making equal of all ``education environment`` wouldn`t be desirable from an endogenous perspective of education because it comes from a sociological way of thinking, and equalization itself will drive out education eventually. Therefore, I concluded that the issue of equality in ``educational environment`` is out of context with education. Education is left still unexamined and untouched waiting to be uncovered with a theoretical frameworks woven fit for its unique and independent characteristics.