The checklist contains records of spiders from the federal contries Schleswig-Holstein, Hamburg, Bremen and the northern plain of Lower Saxony which are compiled from published data, unpublished papers and personal communications. Among the total of 601 species Gnaphosa leporina, Marpissa nivoyi, Dictyna major, Baryphyma maritium, Pelecopsis nemoraloides, Ozyptila westringi, Silometopus ambiguus and Micaria romana are species which occur in Germany mostly in the north-western region. The species records in the checklist can be related to their informational sources and they can be localised in the TK25-grid, which represents sheets of the 1:25.000 topographical map.