The Euro-Mediterranean region can be seen as the focal point for movements between south and north. Starting with this observation, the author addresses the migration problems of the countries on the northern shore of the Mediterranean and the immigration countries of the European Union, which recruit labour from the southern shore (for example, Moroccans working in France, Belgium and Great Britain, Turks in Germany, France, Benelux and Scandinavia, Algerians in France and Tunisians in France and Italy). He also deals with the new immigration countries on the northern shore (Spain, Italy and Greece), as well as the emigration and transit countries of the southern and eastern shores. This work is intended to provide the reader with a critical overview of the existing literature on the theme of "co-development" based on sources in various languages, highlighting matters likely to form part of needs of both immigration countries and countries of origin, and taking account of the questions raised by the experts.