Slovenia is a small country of Central Europe. Until recently, only limited surveys had been carried out of the Phytoseiidae fauna. The occurrence of 14 species had been documented in two international papers: 6 belonging to the subfamily Amblyseiinae, 1 to the subfamily Phytoseiinae and 7 to the subfamily Typhlodrominae. Four additional species (3 Amblyseiinae and 1 Phytoseiinae) were recorded and published recently but in a national journal and not mentioned in the world online database of Phytoseiidae. Here, we present results from 2018 and 2019 field surveys and add a total of 22 new records (18 if we consider national published records): 14 Amblyseiinae, 3 Phytoseiinae and 5 Typhlodrominae. The Phytoseiidae fauna of Slovenia contains after our study 36 species: 20 Amblyseiinae, 4 Phytoseiinae and 12 Typhlodrominae. Among the 22 new record species, at least 8 species are well-known biological control agents (BCA). In addition to the intrinsic value of phytoseiid mite biodiversity in temperate environments, demonstration of the natural occurrence of efficient BCAs is of great agricultural, commercial and strategic interests.