This article aims to reflect on the phenomenon of migration of isolated, unaccompanied or “separate” foreign minors. As adults, they are affected by the existing territorial conflicts, natural catastrophes, exploitation, trafficking and poverty, by persecution on account of their ethnicity, gender or religion, etc. Our case study focuses on France and Portugal. The interviews to several interlocutors helped complement the information gathered on the ground, through direct and participant observation, integrating the organization France Terre d'Asile, in Paris. The research in Portugal followed just a documentary basis.