A rust disease occurred on Veratrum patulum in Deogyusan National Park, Jeollabukdo. The typical symptoms of the disease appeared as small, yellowish spots on leaves at first. The spots then turned brown, their edges rised slightly, and powdery mass of yellow or yellowish brown spores appeared on the lesions. Severely infected leaves blighted and eventually defoliated. Urediniospores were yellowish brown in color, globose, subglobose or ellipsoid in shape and $19{sim}27;{ imes};17{sim}24;{mu}m$ in size. Teliospores were brown in color, ellipsoid, ovate or oblong in shape and $19{sim}36;{ imes};15{sim}21;{mu}m$ in size, the apex mostly rounded, with hyaline or subhyaline conical papilla, the base rounded or attenuated, smooth. Pedicels hyaline or subhyaline, up to $38;{mu}m$ long. The causal fungus was identified as Uromyces veratri Schroeter based on mycological characteristics and host specificity.