This paper deals with the relation between immigration and citizenship taking into account both the point of view of national society of arrival and the point of view of immigrants. According to the first point of view, in addition to the dimension of citizenship as belonging to the national society three further dimensions (territorial location, ecological participation and cultural conformity) are individuated. According to the point of view of immigrants, the author maintains that the system of manifold and interdependent belonging is one of the macro-variables more significant for the determination of positive propensity towards citizenship. This last point is supported by empirical data resulting from a survey on a sample of seven hundred individuals belonging to seven different national groups settled in seven different territorial areas of Italy (Senegalese, Tunisian, Moroccan, Ghanese, Philippine, Chinese and former Jugoslavian).