The new Checklist of mosses (Bryophyta) of Slovenia within current political boundaries comprises 669 species, 6 subspecies and 18 varieties. Additional 13 species are denoted by a question mark since reports are considered questionable. An alphabetically arranged tabular presentation of genera, species and lower taxa, also shows their presence in particular phytogeographical units of Slovenia. The records from the periods before and after 1959 are marked with different symbols. Each species has also new Red List status in Slovenia. The checklist includes the data from literature and the Herbarium LJU. Annotations to selected species give a critical evaluation of the literature and herbarium data. A list of taxa that should be excluded from the flora of Slovenia and the synonyms used in the floristic literature for Slovenia are also added.