Researches of the Belarussian and Ukrainian historians and political scientists, exposing the pressing questions of role and place of Republic of Belarus in the system of international relations, are presented in collection of scientific reasons, features of intergovernmental contacts with separate countries in ХХ - beginning of ХХI of century, and also processes of co-operating with the Belarussian diaspore in the world on the modern stage. The pressing questions of participation are presented in the second head To Belarus in activity of United Nations and feature of co-operating with her structures.A book is counted on researchers, teachers, students and all those, who is interested in the sphere of international relations.