The theme of this research is discursive multimodality and is based on an expanded notion of text (FAIRCLOUGH, 2001), according to which text is defined as a unit of meaning and therefore concerns verbal compositions, non-verbal compositions and also compositions made up of both verbal and non-verbal material. Our aim is to examine how multimodality contributes to the materialization of preventive discourse in posters promoting the Family Health Program (PSF), identifying and characterizing the multimodal elements that structure the genre in question, and verifying how these elements are articulated to construct and naturalize potentially ideological meanings. Under the prism of qualitative research, we carried out a study based on photographic records of posters circulating in PSF service centers. Reports and field notes supported the contextualization and analysis of the data, based on the theoretical-methodological assumptions of Visual Design Grammar (KRESS; van LEEUWEN, 2006) and Critical Discourse Analysis (ADC) (FAIRCLOUGH; 2001, 2003).