This article intends to present some contributions from group psychoanalysis to social work, emphasizing some concepts that contribute to comprehend social phenomenas and grupal processes. We could verify through the operative groups the phenomena of deposits, imaginaries collages and the basic assumption of dependence, that if not elaborated, could paralyze the group process. We considered that the elucidation about these aspects contributes to the comprehension of social processes and for the possibility of psychosocial intervention.