This thesis entends to analyse the evolution of the CFDT from its creation in 1964 until 1988, just before the fall of the Berlin's wall, though the choices made in term of international policy. Indeed positions taken in front of international events, manifestations of solidarity as relationships with foreigns trade unions and international confederations contribute to the identification of the CFDT. It reveals its development and sometimes allows a new lecture of its ideological path. This thesis is based on the archives of the confederation, in particurarly these of the international department and some interview of mens in charge of this policy. These archives had been faced to the archives of international confederations which the CFDT ...