Intermarriage and mixedness have had and still have implications throughout societies. The control of the family is rooted in history: communities and national states have always tried to manage the matrimonial dynamics of their members and citizens. It is through such relationships that the entrance in the community or in the nation is realized. The dynamics of these processes and their intimate and public consequences are good lens for studying family and institutional-social changes over time. Thus, in my researches, I investigate the effects of migration, family and the State by analysing the impact of laws and of social representations on binational families.