Qu'est-ce qu'un thème?

We approach the notion of theme as a problematic one. Particularly, one can observe that the functions of a theme, as they are assigned by the specialists, especially in linguistics and literary studies, are multiple and mutually incompatible. It is from this variety reluctant to the disciplinarized modes of knowledge that we have in mind to establish the semiological nature of the theme. Its development is a knowledge that does not bend nor to analysis neither to synthesis. In this research, the lectures made by Roland Barthes at the Collège de France serve as a guide and as an example.