In this study, two experiments were conducted to investigate the role of suffix in a Korean word, focusing on the position flexibility of suffix. Experiment 1, using the single stimulus presentation method, the performance of nonwords with suffix was compared with their control nonwords in order to know the role of the morpheme and positional specificity. The results showed that the nonword with suffix and the suffix transposed nonword were processed slower than their control nonwords. This pattern indicates that the suffix is decomposed in orthographic processing, and its location is flexible, partially activating the original word. Experiment 2, using the masked priming task, the suffix transposed nonword did not facilitate the processing of the target more than non-suffix transposed nonword in terms of reaction time, but the former reduced the error rates more than the latter. This pattern of results implicates that the location of the transposed suffix is flexible, eventually enhancing the performance of the corresponding target. Overall, this study provided its evidence on the role of suffix and the flexibility of suffix positioning in Korean orthographic processing, a different pattern of results as compared to English case.