This research work deals with the staging of the conflict between reason and irrationality that occurs in the novels and essays of the Argentine writer Ernesto Sábato (1911-2011), from the point of view of the formation, consolidation and apparent synthesis of said symbolic confrontation. Our objective is primarily to examine the representation of this conflict, within which its particularities will be analyzed, as well as the relationship it established with topics such as the dichotomy between scientific knowledge and artistic creation, the literary representation of the irrational and the experimentation with the novelistic and essayistic genres that the author undertook throughout his literary career. In this context, our attention is focused in particular on the three novels by the author El Túnel (1948), Sobre Héroes y Tumbas (1961) and Abbadón el exterminador (1973), as well as in his four main essays, Uno y el universo (1945), Hombres y engranajes (1951), Heterodoxia (1953) and El escritor y sus fantasmas (1963). This study will be carried out through the connections and links established between the texts in question based on the common theme of the staging of the conflict between reason and irrationality, reflecting on the particular ways in which each one, in his own discourse and in relation to others, generates a common thread that connects and unifies them under the same thematic unit. This analysis will establish that the symbolic staging of the conflict between reason and irrationality in the novels and essays of Ernesto Sábato is the basis of his literary work. For this reason, a reflection on the aforementioned issues has been relevant, treated under the perspective of who was considered one of the most important and representative Latin American writers of the second half of the 20th century. ; Ce travail de recherche traite de la mise en scène du conflit entre raison et irrationalité qui se produit dans les romans et essais de l'écrivain argentin Ernesto Sábato (1911-2011), du point de vue de ...