Korean clawed salamander larvae (Onychodactylus koreanus) mainly inhabit mountain valleys, unlike other Hynobius salamanders. This study aimed to reveal if predation pressure affects the distribution of O. koreanus larvae in the valleys through olfactory antipredator behavior tests. In summer, the larvae move downstream that increasing the chance of encountering potential fish predators. So, we wanted to know if antipredator behavior is acquired while first experiencing the predators or innate. First, we investigated the response of O. koreanus larvae to chemical cues (100%, 50%, 25%, and 0%) of crayfishes (Cambaroides similis) and minnows (Rhynchocypris oxycephalus). Second, after learning twice by mixing the target species and potential predators' chemical cues, we tested if antipredator behavior is shifted. Onychondactylus koreanus showed significant antipredator response to minow odors by reducing moved time and distance, but not to crayfish odors. In the second test, the larvae showed significant antipredator behavior regardless of whether they had learned about the predator or not. Our results demonstrate that minnows are potential predator of O. koreanus larvae and potentially affect the restriction of distribution of the larvae in the valleys. In addition, the second result suggests that antipredator response of O. koreanus to minow odors is innate.