A new species of endoparasitic nematodes, Meloidodera sikhotealiniensis, is described. The species was found on the roots of Betula mandshurica (Rgl.) Nakai and Spiraea sp. in the woods of the Primorye Territory. M. Sikhotealiniensis differs from the close species M. floridensis by a small size of the body and the structure of the cephalic end of females, large stylet and long gubernaculum of males, thin digitate terminus of larvae. The new species differs from M. charis in an oval shape and size of the body of females, large stylet of females and larvae, low place of the entry of the dorsal duct into the oesophagal lumen, long and slender tail of larvae.