This dissertation addresses the topic of persuasive speech in infographics, one of the products of the Information Design. The infographics are widely used as a communication tool by the media, in order to transmit information in a synthetic, fast and attractive way using visual diagrammatic representations. Examines and analyzes the visual attributes of the data graphs and infographics from the point of view of visual rhetoric. Investigates the use of the tools available for developing compelling data visualizations that communicate eloquently and efficiently the desired speech, with the adherence of the reader. The theoretical references of the research are the proposal of a Rhetoric of Design, by Almeida Junior, based on the New Rhetoric of Chaïm Perelman and Lucie Olbrechts- Tyteca, the investigations on Visual Perception oriented to data visualization, in surveys of Colin Ware and Stephen Few, and the Semiotics of Charles Sanders Peirce, as a transdisciplinary element, passing through the different topics, integrating them. Were taken, as special cases, infographics from the Newspapers section of the 6th National Exhibition Infographics 2012, Infolide. The analyzed infographics show the intense presence of persuasive tools in printed infographics. As a result, the conclusion that the designer can enhance the persuasive power of their infographics deepening his knowledge about cognitive and language systems that govern the reader s understanding, ie, of his audience.