A new arachnid (Chelicerata: Arachnida) from the Lower Carboniferous (Upper Visean) Szczawno Formation of Kamienna Gora, Poland, is described asSchneidarachne saganii n. gen. et n. sp. Early Carboniferous arachnids are generally rare and this new fossil cannot be easily assigned to any of the known arachnid Orders. It shares a number of features with some members of the arachnid order Solifugae (camel spiders, sun spiders): namely large, forward-projecting, chelate chelicerae with dentate fixed and free fingers, a distinct median sulcus on the carapace and an interrupted ridge of tubercles on the dorsal opisthosoma set into a loosely-defined median field. However, it lacks unequivocal autapomorphies of Solifugae. This fossil may be one of a growing number of stem-group Palaeozoic arachnids which lack the full set of diagnostic characters seen in crown-group members of the various orders. Thus,Schneidarachne saganii could represent a basai member of the lineage leading up to modem solifuges.