Migration is one of the most prominent phenomena in these ultimate years.It has brought some good consequences and economic development,but also a number of socio-economical and socio-political problems,such as decreasing population in the sending countries,brain drain,labour market shortages,etc.This paper focuses on the reasons why people emigrate from their countries of origin and what effects bring their emigration to the national economy.The purpose of the paper is to explain the emigration impact on the labour market in the sending countries,the phenomenon“brain drain”and its effects,the impact of the remittances,and the importance of Diasporas and return migration for the countries of origin.