In Muslim eschatology, death is considered a transition to the afterlife, more precisely to paradise or hell. But the grave can already be one or the other. It can be transformed into a place of terrible punishments just as it can be a pleasant place close in many aspects to paradise. It depends on the behavior of the believer, but above all on the two angels who play a capital role in determining the outcome of his life? Indeed, Nakir and Munkar are two angels (or two demons?) responsible for collecting the benefits and misdeeds of the believer, one on his right collects positive behavior and the other on his left collects negative actions.This study focuses on these two key figures in Muslim eschatology and the narrative questions that this raises. It will be divided into two parts, the first diachronic will attempt to reconstruct the genealogy of the discourse on these two angels in the sacred texts, the Koran and the sayings of the prophet, as well as among the exegetes who subsequently took up the subject; the second part aims to determine their place in Muslim eschatology and the role they play in the narrative economy of afterlife's stories.