This essay is aimed to develop an interdisciplinary review of the Latin American informal sector micro-enterprises, to identify the features which characterize them as social entities, subject of social, public policy dictated and social mediation. The characterization is necessary to identify that fact, understood as a social object that can be approximated to configure, looking for the overall benefit of society. Critical dialogue between economics, sociology and anthropology, provides elements that allow a rich and fruitful reading of the reality of informal microenterprises in Latin America.