The aim of this BA thesis was to present the influence of postmodernism on the image of superheroes in mass culture. It presents the most important features of postmodernism, as well as the most popular characters from the world of comics of that period. Their influence on the mentality of the recipient of the 20th and 21st centuries was also discussed. The subject of simulacra creating the world of heroes, important for the context, was also discussed. The diploma thesis is based mainly on the work of the Italian writer Umberto Eco, considered one of the most important authors on the subject of postmodernism.