The aim of this paper is to show some ways to reflect on the journalistic objectivity, inserting the press within the field of the production of realistic discourses arisen in Modernity. The present theoretical enterprise makes use of the concept of "discourse" and its articulation with power-knowledge relations in Foucault’s work in order to point that truth effects occur within the journalistic discourse with the notion of objectivity. It offers a brief historical explanation of the notion of objectivity from the perspective of aesthetic realism and the new techno-urban culture consolidated in the 19^th Century. The conclusion points that the modern crisis of representation has a profound influence on the journalistic practice centered on objectivity.