The increasing contribution of the business parks in peripheral urbanisation and rurban diffusion : an example, the Edge of the Artois regions. In the face of the increasing competition to attract enterprises, municipalities in the Edge of the Artois region, whatever their size or their situation are creating more and more business parks. In spite of their relative success, they are an essential medium for peripheral urbanisation and rurban diffusion. Receiving help from many partners, and having new rights through the decentralisation laws, municipalities use these new competences to multiply the business parks along the main roads and near the highways access. As the typology of periurban spaces according to their interest to create new enterprise sites, try to show us in the most important towns, nothing prevent an unrestrained spaces consummation for every local territory. It seems all the more dangerous that the Edge of the Artois region is an intermediate space. Business parks development is a true challenge for town and country planning.