Sunyoung Lee. 2017. Online Processing of Dependency between an NPI and Negation in Korean. Studies in Modern Grammar 95, 19-36. The present study investigated online processing of syntactic dependency between a negative polarity item (NPI) and its negative licensor in Korean. A total of 32 adult native speakers of Korean participated in the study. The study employed a region-by-region, self-paced reading paradigm to measure online reading times. The results showed that as soon as a parser encountered an NPI in the sentence, it expected a negative element to come up at the earliest potential position. Slow reading times occurred at the first candidate site if such an expectation was not satisfied immediately. The findings of the study support the Filled Gap Effect in English (Fodor 1978; Crain and Fodor 1985; Stowe 1986; Frazier and Clifton 1989) and the Typing Mismatch Effect in Japanese (Miyamoto and Takahashi 2001, 2002); Aoshima et al. 2004; Ueno and Kluender 2010). The results suggest that the human parsers, despite the different structural properties of each language, use the similar sentence processing mechanism.