This paper presents the results of the research conducted so far on Araneae of the Kampinos National Park. After verification of the published data, it was established that 305 species of spiders recorded in the Park area; this is 36.8% of Araneae reported from Poland. The results of the study so far indicate that Kampinos NP is characterized by a very great diversity of araneofauna. In the Park have been found four protected species: Agroeca dentigera, Eresus kollari, Philaeus chrysops, Yllenus arenarius and many rare and interesting spider species, e.g. Archaeodictyna ammophila, Enoplognatha mordax, Haplodrassus moderatus, Kishidaia conspicua, Titanoeca spominima and many others. Three species: Micaria micans, Pardosa alacris and Sibianor larae are reported for first time from this park.