Abstract : The development of the inter-municipal cooperation gives rise to some major territorial and governmental reorganization. The elected in charge are then confronted to the complex exercise of the inter-municipal cooperation and the definition of a territorial project. It will be a question of studying the inter-municipal cooperation towards the technical, political and territorial apprenticeships operated by the mayors. That is illustrated by the study of the Toulouse city région, which is splited in three communities of town : it shows more or less advanced territories in the movement of community integration. Some technical managers and more than eighty mayors were asked about that.