Ethnographic action research on the prostituted persons of black African origin, which are found in the carrees of the Noordwijk. The prostitutes who are active in the carrees and of sub-Saharan descent remain a public we do not know well and the actors in the field (associations, police) find it hard to enter into a relationship of trust with them that is sufficiently strong to optimize the help that can be offered to them. This research therefore aims to refine that knowledge, to show possible myths or stereotypes or to objectify them on the contrary.