This paper traces the (de)formative force of Heidegger's thought on Blanchot's writing. In the paper, I attempt to show how the question of nihilism and the question of truth in the work of Heidegger impose on Blanchot what he calls the exigency of the fragment. This exigency arises more specifically from an affinity and attunement in Blanchot's work to Heidegger's sense of Aus-setzen, on the one hand, and a resistance in Blanchot's work to Heidegger's sense of Ent-wurf, on the other. Fragmentation responds to the risk of ex-posure in a way that withdraws the horizon against which something like Entwurf might be "measured." This response can be characterized as a renewed atentiveness to the relation of errancy and withdrawal.