The fauna of freshwater fish were investigated from April, 2010 to November, 2010 at forty-two stations in Seoraksan National Park. During the surveyed period, Collected fishes were 2,822 individuals and were identified to 35 species of 27 genera belonging to 12 families. All fish were primary freshwater fishes, except for Tribolodon hakonensis, Plecoglossus altivelis, Cottus hangiongensis, Gymnogobius urotaenia, Rhinogobius brunneus, Tridentiger obscurus. The endemic species of Korea were 13 species: Coreoleuciscus splendidus, Gobiobotia brevibarba, Hemibarbus mylodon, Microphysogobio longidorsalis, Pseudopungtungia tenuicorpa, Rhynchocypris kumgangensis, Zacco koreanus, Iksookimia koreensis, Koreocobitis rotundicaudata, Silurus microdorsalis, Pseudobagrus koreanus, Liobagrus andersoni and Coreoperca herzi. Dominant species was Zacco koreanus(25.97%) and subdominant species was Rhynchocypris kumgangensis (20.06%). Endangered species (Level II) were 5 species: Gobiobotia brevibarba, Pseudopungtungia tenuicorpa, Pungitius kaibarae, Pungitius sinensis and Cottus hangiongensis. Natural mounment species was 1 species: Hemibarbus mylodon.