The aim of this paper is to research the inconsistencies between Regulation of Standard Korean Pronunciation and Rules of Korean orthography, focusing on the pronunciation of /rye/. By doing a critical analysis for Regulations of Standard Korean, we can find several mistakes and inconsistencies within the regulations. We conclude that Regulation of Standard Korean Pronunciation #5 should be modified because the pronunciation of /rye/ is derived by the same phonological rule that applied to /gye, mye, pye, hye/. The real pronunciation [ke, re, me, p^he, he] are the results of monophthongization.