The concept of "rurality" is divided between common sense ans social science. It is the expression of the existence of a true intellectual coproduction between the two forms of knowledge. The first one, that is to be linked with the "Maisons familiales rurales", is to take on its relation to the (changing rural) world and to itself; a bric-a-brac made up of, among other things, the discourse of social science, is then used. The second one objectivizes a knowledge in which its own analyses are constantly taken over again and become full part of ways of understanding that members of that institution use: therefore it contributes to partly produce the object it analyses.