The Sidi Moumen district of Casablanca, which is considered here in its social, functional and spatial dimensions, is an unacceptable standard in the face of Casablanca's will to modernize. The practices and data of marginalization have historically built its symbolic pocket, Socially and contrary to the hierarchical and holistic notion of marginalization, the province is home to a diverse population ranging from the poorest to the middle classes. Contrary to the prevailing notion that this area is isolated or isolated and characterized by anomalies, it provides resources at the city-wide scale. In order to understand this issue the effectiveness of this intervention in solving the housing crisis in Casablanca in general and in the district of Sidi Moumen in particular and the forms of spatial configuration in this sector of the city, the extent of effectiveness of this form of management and its functional and spatial dimensions in the organization of the urban area of the city Casablanca, by reference to the previous management experiences of the urban area of Casablanca and the analysis of the territorial policy of the Sidi Moumen district.This raises the problem that we will try to answer, which relates to the inputs and outputs of the territorial policy in Sidi Moumen, including Casablanca. And the limits of this policy? Based on an analytical descriptive approach to examine the parameters of this policy and its description, and the staff of critical approach to relate the subject to its general context and to analyze the reality of the land policy in the interior urban marginal areas and the requirements of justice.