The genus Parens comprises small moths, with a wingspan of 9–13 mm, belonging to the family Erebidae. Until now, only four species have been described worldwide. In Korea, only one species, P. occi (Fibiger & Kononenko, 2008) has been known to date. In this study, a new species from Korea, P. fibigerina Lee & Byun, sp. nov., is described. As a result, two Parens species are now known from Korea. Figures of adults, male and female genitalia, and a key to the species of Parens in Korea are provided.