Migration means the movement of persons from one place to another, one country to another country. Migration is not a new phenomenon; it was prevalent in the ancient times. People migrate due to economic, political, commercial and social factors. But migrations now days have become a big problem for developing countries like India. The term 'Brain-drain' has recently come into vogue for describing the flight of talent from our country to another. Often, it is loosely employed to describe all migration of educated and talented persons to countries abroad in search of better careers even though their services may be badly needed in their native land, and thus, this exodus of talent, depletes a country's intellectual resources. This paper analyses the factors responsible for migration, effects of migration on the Indian economy and suggested measures to control migration.