Various factors influence development and individual differences in reading abilities, including phonological and morphological awareness, working memory, etc. Recent studies reported that in addition to these factors, individual differences in visual span, which is defined as the number of letters accurately recognized within very short period of time, without moving eyes, also contribute to differences in reading fluency. However, no studies thus far have attempted to measure visual span in Korean Hangul reading, a unique writing system that combines consonants and vowels into given spaces based on syllabary. The present study measured visual span of 2nd, 4th, 6th grade and adult Korean readers, using trigram paradigm, and examined whether individual differences in visual span relates to reading abilities. The results showed that indeed, visual span differences contribute to reading abilities, suggesting that this relationship holds in the development of reading Korean Hangul.