The purpose of this study is to compare the maximal strength, isokinetic muscle function and anaerobic capacity according to the positions of college and professional rugby players. Subjects for this study were 54 athletes and randomly divided into 4 groups: the forwards group in college rugby players (FCRP, n=16), backs group in college rugby players (BCRP, n=10), forwards group in professional rugby players (FPRP, n=16), and backs group in professional rugby players (BPRP, n=12). Maximal strength test was consisted of squat, bench press, bilateral grip strength. Isokinetic knee and trunk muscle functions were measured by Humac Norm device, and anaerobic pedaling power was analyzed by Wingate test. Significant differences between groups were determined with one-way repeated ANOVA. As the result of this study, there was no statistically significant difference between the absolute and relative values of the squat and bilateral grip strengths, but bench press was significantly higher in FPRP and BPRP compared to other groups. Isokinetic knee and trunk extensor and flexor muscle strength showed stronger in FPRP and BPRP than those in FCRP and BCRP as well as it was the strongest in BPRP. In addition, the anaerobic pedaling power was also the highest in BPRP. Thus, our findings suggest important information that the college rugby players and forwards in professional rugby team should be given scientific training to improve their maximum strength, isokinetic strength and anaerobic power.