Abstract : Traditionally, and in the field of psychologic in particular, cognition and affectivity are investigated as separate psychological manifestations which its interrelation with other psychological functions are little regarded. In the same way, not emphasize the cognitive and affective dimensions centering its focus of analusis in quentions related to conflicts, such the so called "identity crisis" or to pathologies as "identity split" - present in schizophrenia. The purpose of this text is to present and discuss the theme : identity from the most current conceptions in social psychology aiming to emphasize its cognitive and affective dimensions. This is based on an empirical study about the identity representations of group of immigrant in which these dimensions are in surface. The self-concept and self-esteem presented by this group point to the importance of situation of migration in the constitution of identity representations as well as reinforce the postulate about the sociocultural character of the cognitive and affective dimensions of identity.