Abstract: A new species of squat lobster, Uroptychus parilis sp. nov., is described and illustrated from two female specimens collected in taiwan. The new species is closely related to Uroptychus babai Ahyong and poore, 2004, and was misidentified as it before. Uroptychus parilis sp. nov. is characterized by having the lateral margins of the carapace smooth and slightly irregular, the thoracic sternite 4 produced into a sharp spine which reaches the anterior end of emargination of the thoracic sternite 3, and the antennal scale falling short to slightly overreaching apex of fifth peduncle segment.