A new genus and two new species of Oribatida, Nuhivabates nukuhiva n. gen., n. sp. and N. hivaoa n. sp. from the Marquesas Islands, French Polynesia, are described and illustrated based on adult specimens. Nuhivabates nukuhiva n. sp. is recorded from Nuku Hiva Island from the northern part of archipelago, and N. hivaoa n. sp. from Hiva Oa Island in the southern part of the archipelago. Nuhivabates is considered a member of the ycobatidae Grandjean. The two new species show distinct sexual dimorphism, with differences in size, position and number of notogastral porose areas, and males with a pair of posterior tubercles.