Abstract: The two concepts of world heritages and Biosphere reserves come under the aegis of UNESCO.Their objectives are mainly to conserve species diversity and ecosystems of the world.What similarities and differences between both whatever it may be perhaps the public and the media are not yet understood,especially some biosphere reserves are also included in the world heritage list,and often leading to some confusion.In fact,world heritage sites and biosphere reserves have fundamentally different purposes,objectives,legal status and management principles and should not therefore be confused.The paper deals with this problem for reference to related aspects.

Key words: World heritage convention, Word heritage site, World heritage list, Man and Biosphere Programme, Biosphere reserve