A new species of the genus Charinus Simon 1892 from the state of Minas Gerais, Brazil, is described. Charinus jibaossu sp. n. is morphologically close to C. mysticus Giupponi & Kury 2002 and shows both a marked secondary sexual dimorphism in the pedipalps and an interesting polymorphism in the spines of the distitarsus. The new species is endangered because it inhabits a region highly impacted by mining activities.