The nematodes associated with rice in Korea were investigated at 1,160 rice paddies in 387 localities during the last 3 years since 1985. As the result, 35 nematode species were found associated with rice in Korea. Among them 26 species were newly reported from rice in Korea; and 15 species, Criconemoides informis, Criconemella paragoodeyi, Criconema (Criconema) jaejuense, Ditylenchus longicauda, Eutylenchus africanus, Merlinius n. sp., Meiodorus n. sp., Ogma(Homogma) serrata, Ogma(Homogma) insulicum, Orientylus orientalis, Paratylenchus lepidus, Pararotylenchus pini, Triversus n. sp., Tylenchorhynchus clavicaudatus, Tylenchorhynchus nudus were firstly added for the world as associated with rice. Criconemella paragoodeyi, Merlinius n. sp., and Ditylenchus longicauda were distributed all over the country with high population density, and expected as potentially important rice parasitic nematodes. Hirschmanniella imamuri was distributed all over the country with high population density. Hirschmanniella oryzae was also distributed along with Hirschmanniella imamuri in the southern part of the country, but gradully disapeared as it goes to the northern part.