La Côte d’Ivoire, pays d’Afrique de l’Ouest prospère et stable depuis le début de l’indépendance de 1960, bascule dans une longue et douloureuse guerre, le 24 décembre 1999, à la suite d’une mutinerie de soldats. S’en suit alors un intense ballet diplomatique visant à rétablir la paix et la Côte d’Ivoire assiste alors à plusieurs tentatives de médiation internationale. Cette recherche vise à comprendre la notion de succès en médiation en proposant de modéliser le conflit ivoirien à partir d’un modèle de la théorie des jeux, celui du dilemme du prisonnier. / Often cited as a model of peace and stability, Ivory Coast, a West African economic powerhouse, was embroiled in a civil war in September 2002 that disrupted the institutional order. During this time, the country was divided into the Southern and Northern zones. The former, a coastal area, is referred to as the "Governmental Zone". The Northern is the area that was captured in September 2002, by a few thousand army mutineers. Between the two North and South divide lies the buffer zone called the Zone de confiance, which served as a military buffer zone between the North and the South. How did the division occur? How did the several mediation work? Could we ensure that the signing of a peace agreement guaranteed a mediation success?