The Roma are the sole people in Europe (still) having a living customary law system. In this article, we intend to explore and to analyse the hypostases of the interaction between the customary law of the Roma in Romania and the Romanian law system. To do so, we will first briefly present the theoretical framework guiding our analytical demarche, namely normative pluralism. Then, we will present the main differences between the two legal orders in relation with the two modes of social and political organization. Finally, we will sketch and explore the three hypostases of the interaction between the Roma customary law and the Romanian state law — the official non-coplanarity, the marginal intersection and the exceptional subordination.