Pallas’s Long-tongued Bat, Glossophaga soricina (Pallas, 1766), has a large range, covering much of the Neotropics. Until this study, Argentine records for this species were restricted to Misiones, Chaco, Salta, Jujuy and unverifiable records from Buenos Aires. We report the discovery of this nectarivorous bat in Corrientes, extending its known range and increasing the number of bat species recorded in this province to 32. An adult male was captured in Apipé Grande island in October 2019. This bat species is considered Vulnerable in Argentina and needs urgent conservation action in order to avoid further threats.