This dissertation focuses on the poetic study of the short stories written by argentinian writer Hebe Uhart (1936-2018). The literary corpus includes fifteen short stories published between the 1960’s and 2013, period which comprehends all the author’s short story trajectory. At first, this thesis points out that solitude, incommunication and self-absorption —typical aspects related to existencialism— are key thematic elements that integrates and unites the short stories. In this way, the question about the ‘mortar’ which puts people together is developed in paradoxical terms: if there is something which puts people together, that thing is the same that splits them apart. Secondly, the predominance of non-mediated narrative forms is interpretated as a sign of the decline of the omniscient narrator. At last, the open structures —with non conclusive endings—, the adoption of other genres and the subject's unit of perception which characterizes Uhart`s short stories are related to a contemporary poetics that materializes the crisis of the experience and the disbandment of the world.