After World War II, victorious and vanquished countries faced various difficulties which accompanied by high unemployment rates, falling the welfare points per citizen, low wages, disruptions of trade relationships among countries. These factors required reforms through Europe, the solution of political, economic and social problems was seen in integrated and harmonized economies within Europe. The first solution was the European Coal and Steel Community which has been transformed into the European Union. The free movement of people concept was introduced with the Rome Treaty in 1957. Research data comparative analysis has been focused to especially to free movement of employees. The thesis interprets the free movement of people and the workers.