Return migration has been realized to be an important concept on migration and development of individual and home country. Return migration involves flow of migrants as returnees from abroad and their return may have some impact to the host country and the home country. Migration and return migration has been stimulated by international instruments pronounces about the rights of migrants and return. The most important instrument is the Universal Declaration of Human Rights of 1948, article 13(2), which states: "every- one has the right to leave any country, including his own, and to return to his country". Authors have tried to describe the concept of return migration and its contribution to social or economic development in different levels. The book has described the reality of concept of return migration to the global level, regional level especially sub-Saharan Africa and country level based on Tanzania in relation to its intervention in absence of migration policy.