ENThe Baltic Sea is named as one of the most polluted seas in the world and is of increasing public and state concern. The pollution of the Baltic Sea is determined by the hydrographic, ecological and geographical characteristics of the sea. However, pollution of the Baltic Sea is determined not only by the geographical, ecological and hydrographic characteristics of the Baltic Sea. Active human activity in the Baltic Sea region also contributes to the large scale of pollution. The regulation of the Baltic Sea environmental protection consists of a wide-scale legal regulatory mechanism for the protection of the Baltic Sea environment. Lithuanian legal regulation includes aspects of maritime flora and fauna protection, the evaluation of the impact of planned economic activities, the regime for the protection of marine environment, the measures of protection of coastal zone in the seashore of the Baltic Sea. Furthermore, the article discusses the implementation of the Marine Strategy Framework Directive in Lithuanian legal regulation. Keywords: Baltic Sea; marine environment protection; Marine Strategy Framework Directive; environmental impact assessment. [From the publication]