Resumen
In Catalonia, during last years, the conflicts related with the use and management of the territory among the administration and the citizenship have increased, especially during the process of drawing up and execution of some urban plans. This article pretends to analyse which are the causes that originate them and to identify the actors that intervene and, therefore, it will pay attention to the strategies of mobilization that citizens develop and the discourses that create trying to influence the planning process, as well as to the actions that the local administration undertakes.