Numerous international companies are diffusing today, a speech that they characterize as ethics. Far away from replacing one with the others, the code "ethics", the devices about social responsibility of enterprise or more recently the long-lasting development, complete each other and they are strengthened mutually in order to compose an architecture of which, the coherence is striking. It is necessary therefore, not to examine these elements separately in order to analyze their relations and the sense they produce. It is in this perspective that we will examine the case of enterprise EDF. This enterprise is very interesting, because of the approval of its ethical path, that led in 2005 to an agreement of "social responsibility of enterprise" with the trade unions that embraces a period of approximately ten years. It directly offers a great view of this phenomenon, connected to the internationalization of the enterprise and the opening of capital. Used from the management as an accompaniment of these deep changes near the employee workers, the ethics definitively will be colonized from the managerial logic. Or will it be different?