This article reports the results of an ethnographic study of migration patterns (al-Hijra) in French Salafist communities. The study reveals the break that Salafist believers attempt to achieve with their social and cultural environment after they embrace this puritanical, hard-line form of Islam. For Salafists, migration represents a physical and above all moral exile that begins before converts depart for predominantly Muslim countries. Indeed, the migration process begins gradually as believers seek to distance themselves from “sources of perversion” in France that Salafists oppose.