The Chinese many-tooth snake (Sibynophis chinensis) is an endangered species that currently inhabits only Jeju Island, Korea. In order to predict the possible distribution areas in mainland Korea that this species can inhabit, species distribution modeling was performed using sighting locations of Chinese many-tooth snakes in Hong Kong and Taiwan. The results showed that among the major environmental factors that were used for the species distribution model, the altitude and Precipitation of Warmest Month, Precipitation of Driest Month contributed the most. The results predicted that the Chinese many-tooth snakes would usually be distributed on the edges of forests. Areas in Korea that they were able to inhabit were shown to be the southern and western coasts, in addition to Jeju Island, and on the border between agricultural land and forests, which is similar to the species distribution model of Hong Kong and Taiwan. This study could not verify the exact characteristics of distribution areas because microhabitat factors such as vegetation and soil were not reflected. However, the habitat prediction may be more precise in the future if environmental factors of microhabitats are studied and a microscopic analysis is made in the study of the Chinese many-tooth snake.