This study was carried out to analyze the home ranges of three medium-sized mammals(Nyctereutes procyonoides, Prionailurus bengalensis, and Meles leucurus) inhabiting the Sobaeksan National Park, Korea. Three individuals of each species were captured using live traps(Tomahawk live trap 210A) and radio tracking was conducted from June 2012 to May 2014 using VHF and CDMA methods. We determined that the home range of N. procyonoides was $6.53{pm}6.66km^2$(MCP 100), $3.39{pm}4.73km^2$(FK 95), and $0.48{pm}0.62km^2$(FK 50), that of P. bengalensis was $7.13{pm}5.61km^2$(MCP 100), $7.77{pm}3.91km^2$(FK 95), and $1.88{pm}0.96km^2$(FK 50), and that of M. leucurus was $1.77{pm}1.82km^2$(MCP 100), $3.17{pm}4.52km^2$(FK 95), and $0.63{pm}0.87km^2$(FK 50). The home ranges of both N. procyonoides and P. bengalensis were greater than that of M. leucurus, and moreover, both were larger than $6km^2$(P. bengalensis>N. procyonoides). The results also showed that for each species, 1.2~4.4% of the home range overlapped with that of the other two species and that this overlap occurred in the vicinity of a water system.