Nhay lua is a kind of ritual that has the belief factor of Pa Then ethnic. Nhay lua have organized from October to December every year (Yin calendar). This Ritual attracts many people around the village and other villages cause of the magic factor. People take part in the nhay lua ritual that is youth men. Before the Ritual starts, the Shaman reads the ancestral tablet in 34 hours to connect with spirits. In my article, We want to bring people an opinion about relief roof in nhay lua ritual. There are some explanations about shamanism in a ritual of Pa Then ethnic in Ha Giang, such as purpose and meaning of nhay lua ritual; the phenomenons spirits descend or incarnate. Thence, we can explain the origin of nhay lua ritual.