Individuals identify and belong to many social groups and the notion of identity negotiation can shed light on the way individuals manage this identity diversity. Based on a case of young French activists, two propositions are developed concerning the process of identity negotiation. First, young activists choose and negotiate ``between'' their various identifications to build their political identity. Second, their incapacity and unwillingness to decide between the diverse facets of their identity lead them to negotiations ``of'' these facets, as they relatively balance each of them, depending on the situation. It is further assumed that the very duality of the process of identity construction is the prerequisite allowing association between the concept of identity and the concept of negotiation in its sociological sense, which belongs to the sphere of compromise, instead of war.