A short inventory was carried out on the Haarlerberg in the Nature Park Sallandse Heuvelrug in the province Overijssel, the Netherlands. The inventory was broken off because it killed too many lizards in the pitfalls. The spiders of the first catch were identified and are listed. A total number of 809 specimens belonging to 43 species were found. Eleven species appear to be new for the province Overijssel.