Each country wants to increase the level of welfare with maximum benefits from the sea;but it must do within the framework of international regulations.In seas which is contiguous to more than one countryregulations are required and this situation limits the possibilities of the countries to benefit from the sea.For this reasonevery coastal country aims to processing natural resources by achieving the highest authority.The importance of maritime jurisdiction for Mediterraneanan area which is at the intersection of energy sources and transport corridorsreflects legalmilitarypolitical and also commercial strategies applied in maritime areas.Purpose of the book is expressing the efficacy of delimitation of maritime boundaries on national securitysocialeconomicfinancial interests and indicate the importance of these efficacies on the Mediterranean security.Sobasic concepts related to maritime jurisdiction are mentionedit is defined what maritime area means for the coastal countriessome case studies are examined and finally the relation between delimitation of maritime boundaries and maritime security is indicated.(Akdeniz Yetki Alanları ve Güvenliği).