A check-list of the types of Poaceae at the herbarium of the Institute of Botany, São Paulo, Brazil (SP) are presented, totalizing 206 specimens and 108 taxa (103 species, two subspecies, and three varieties). Regarding the categories of types, 23 are holotypes, 73 are isotypes, 109 are paratypes, and one is a sintype. Seven type materials pointed in literature as being at the herbarium SP were not found or had an uncertain status.