Abstract
The invention of the M.P. Parlementary meetings and the specialization of the political activity in the XIXth century. Jean Joana [23-41] Weberian categories about «notables» and «professionals» present the first one as dilettantes who spontaneously dispose of resources and «savoir-faire» necessary to political activity. The analysis of representation and practices mobilized by notables who sit into chambers from 1815 to 1877 allows to contest this prospect. The involving of «réunions de députés», is showing an authentic specialization about the activity exerted by this staff, not only about specific interests and stake, but too on particular competences and savoir-faire. During this time, the increase of «réunions» proves the effect used by the parlementarian institution upon the definition of constitutive role about deputy craft and professionalization of political activity.