This chapter analyses the reasons given by Senegalese migrants for their decisions to emigrate, through personal life histories. It is based on the author’s research since 2003 on the migrant networks formed through what he calls “multi-sited villages”, social units comprising both the inhabitants of a rural site and the members of their families living in different places. The reasons for leaving are mostly linked to essentially economic contextual factors: financial considerations, the rural exodus, a slump in urban areas and educational aspirations.