Because of the suitability of coastal lands for different groups of activities such as recreational, residential and commercial functions, there is an increasing demand among different stakeholders to benefit from these natural lands. The conflicts between the users, sometimes, lead to exclusiveness and limitation of public access to the shoreline. This article aims to recognize the main agents and mechanisms intensifying the spatial segregation and limitation of public access to the coast. By applying the qualitative methods of Interview and documentary analysis in the middle shoreline of Caspian Sea, the categorization of exclusive public shoreline, their supportive contexts and spatial outputs, are formulated. Findings show that in contrast to the privatization of publish shoreline throughout the world, in Iran, beside the role of private sector, it is the government who benefit from the shoreline exclusively. In order to find the role of institutional contexts, analyses of the formal and regulatory documents, laws and regulations, showed the negligence in performance of coastal and agricultural land use control systems which accelerate the processes of land use change and creation of exclusive spaces in the form of gated communities. In the last step, the analysis of interviews with key actors showed the unsuitable spatial consequences especially social segregation and also decline in economics of coastal cities.