A theory of age in modular production by Pierre Bourdieu, would be a rejected project without even being close in depth to the notion of habitus of age. Working on the notion toward a goal of code of age, this article analyses the articulation between social field and age. It’s two sub-fields (longevity and classes) distinguish the reality of the modern dominant culture, social production of habitus of age differentiated from (childhood, youth, adulthood, the elderly, etc.). It also distinguishes generational habitus, in relation to the sub-fields of these generations. This article applies for conceptual elements which are constructed as useful tools for gerentology and other topics which address age.