This paper investigates how Korean stops are differently realized in the Cheonnam and the Seoul dialects. There exists a controversy over whether there is still a three way contrast in VOT among Korean lax, aspirated and tense stops (Cho et al. 2002; Silva 2006). Furthermore, a question arises whether VOT differences for Korean stops can indicate regional dialects in Korean (Choi 2002). Phonetic results suggest that Korean speakers of the Cheonnam and the Seoul dialects still use VOT and F0 as the acoustic cues to mark the laryngeal contrast in Korean stops in contrast to Silva''s (2006) claim.