The purpose of present study was to explore the reading fluency of elemenatary school students in Korea. To achieve the purpose of this study, 150 sixth grade students were selected from two schools of Gyeonggi province and their reading fluency was evaluated. Assessment of reading fluency was administered as follows: students were asked to read orally a reading text for one minute, which was developed for this study and the teacher checked their reading performance according to assessment criteria developed by Zutell and Rasinski (1991). Reading fluency dealt with four subcategories: decoding accuracy, reading rate per a minute (WCPM), expression, and comprehension. Mean score at each subcategory and its aspect were analyzed, expression element were compared between the lower and higher group, and finally co-relation between reading fluency and comprehension were examined. The results showed that while most students gained higher score in decoding accuracy or reading rate, their expression was lower. Among four sub-categories of expression, i.e. expression and volume, phrasing, smoothness, and reading rate, score of expression and volume was the lowest. Most students read text with little expression or enthusiasm in their voice. On the basis of the result, some ideas for teaching fluency were suggested.