Today the subject of the social responsibility of companies is a universal debate, in the various recoveries that it is in international symposiums, exhibitions of business or in academic conferences. The objective it is that Morocco adopt a strategy of opening with respect to the international economy. For this purpose, Moroccan companies which target internationalization, the improvement of their competitiveness and sustainable development of their environment, are supposed to assume and integrate in their chains of value the principles of the corporate social responsibility. The challenge consists to make sensitive companies, in setting up in their processes of production of the new models of ecological affairs (Eco-innovation), allowing to improve their performances economic and assuring afterward a corporate social responsibility towards the environment. From all that we are going to present, we can consider the concept of Eco Innovation a strategic tool, capable of helping the decision-makers realize the principles of her corporate social responsibility, and to establish a culture of the responsible company. For that purpose, the main objective of this article is to define the notion of the social responsibility of companies as well as the notion of the eco-innovation and to tie up well their ends (purposes).