The author tracks the affinity between the post-war writings of Aleksander Wat and Jacques Derrida’s reflection. Both in the works of Wat, and in deconstruction, he finds a peculiar existential drama which consists in experiencing the chance of comprehension and the constant disintegration of sense, which both authors are honestly trying to face up to. Hence, Wat’s writings and Derrida’s thought are characterised by unique autobiographical qualities and by a (negative) dialectics of whole and part which aims to demonstrate openness, non-completedness, fragmentary nature or each of the existential projects. From this perspective three Wat’s poems are interpreted: *** [If the word “exists”…] [Jeżeli wyraz „istnieje”…], Reminder [Przypomnienie] and Necelh ijdara, wherein the author of the paper sees a clear deconstructive “sensitivity”.