This article aimed at capturing the social representations of postpartum women on prenatal care in primary health care. This is a descriptive, qualitative study, guided by the Theory of Social Representations, developed in nine Family Health Centers, in Fortaleza, Ceará, Brazil, from May to July, 2012. 31 women on postpartum were interviewed through semi- structured interviews. The interviews were recorded, fully transcribed and processed through ALCESTE software - 2010 version. The results observed in the lexical analysis of the interviews revealed the distribution of contents in four classes. Classes 4 and 1 dealing with prenatal care were explored in this study. Social representations of users about the prenatal are anchored in the protocol dimension and socio-educational dimension. The implantation and the maintenance of activities are necessary in order to share knowledge and interaction among the users.