This Ph.D thesis examines and discusses the notion of dispositif (device) such as it emerged within the contemporary French philosophy, mainly in Michel Foucault's and Gilles Deleuze’s works. Its intention is to criticize the association in architecture of the structural and the organization, to propose an architectural practice less dedicated to the assemblages of environments, but which facilitates situations of freedom. For that purpose, this thesis studies the notions of form and function in architecture from a philosophical order reasoning on the ""material"". Three moments of a possible history on the material are considered. In the first two moments, dedicated to the concrete, and ""smart"" materials respectively, architecture appears in its connection to a mode of the industry and to a labor economy. In the third moment, it is shown how the staging and fiction can contribute to transforming materials into dispositifs. On this base, we move, on the one hand, to strip the notion of form from the functional significations that surround it, while on the other hand, we put in tension Michel Foucault's reading proposed by Giorgio Agamben, putting into context the concepts and the suggestions implied in it, in regards to economy. All this work is indissociably architectural and philosophical. Its purpose is to establish the essential character, for both domains of thought, of the notion of an aimless form or “form for nothing "". This notion can be related to an architecture of the ""discontinuity"" whose materials are neither in harmony with the structure nor the power of the dispositifs.