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Samples from arctic sea ice were studied for their rotifer fauna. Ice core samples were collected in the northern Barents Sea and the Laptev Sea from August to October 1993 and in the Greenland Sea from July to August 1994. Eight rotifer taxa, Encentrum graingeri, Proales reinhardti, Synchaeta bacillifera, S. cecilia, S. glacialis, S. hyperborea, S. tamara and S. sp., were found. The geographical as well as the vertical distribution and abundance of the taxa in the ice is discussed, with regard to biotic and abiotic parameters of the sea ice environment. Species redescriptions are given for Synchaeta glacialis, S. hyperborea and S. tamara.