The scyllarine lobster Chelarctus cultrifer is described as the first species of the genus Chelarctus known from Korean waters. C. cultrifer is very similar to the Galearctus kitanoviriosus but it is different in the pleura of the abdominal somites 2 to 4 are broader and ending in sharp posteriorly directed points and having the propodi of pereiopods 3 and 4 are forming subchelates with the dactyli. The record of the species represents an extension of its previously known range from Somalia to Hawaiian Islands and brings the number of known species of the scyllarine lobsters in Korea to three.