This paper discusses the importance of social responsibility as a base for sustainability and tries to provide an overview of this relationship in Brazil nowadays. It is recognized as necessary the existence of three classes of economical, ecological and social sustainability and the big challenge of reconciling these three elements. Are included the results and discussion of a research aiming to identify the different viewpoints on these subjects and its awareness in a group composed by lawyers and other professionals. It is expected that this research may contribute for the adoption of propositions able to improve this degree of awareness in Brazil, including a better commitment of the legal professionals.