Information about the mycorrhization species of Carex L. ( Cyperaceae ) were accumulated from 60 sources and were analyzed. There are 172 species of sedges that have ever been studies for the presence of arbuscular mycorrhiza. In 97 species (56.5 %) mycorrhiza is not found; the 23 species (13.5 %) mycorrhiza is found always; 52 species (30 %) may form or do not form mycorrhiza. The share of species of Carex, in respect of which shows the ability to form mycor- rhiza, increases with the increase of the number of research.