|Purpose：To investigate of gait change as Q-angle in chronic knee osteoarthritis patients. Methods：Participated osteoarthritis disease patients(n=16) and normal adults(n=16). gait measure was used by GaitRite and Q-angle measure was used by tape measurement Results：SPSS for win version 12 was used for statistic analysis and independent t-test used to find between the two groups. In the comparison of Q-angle between groups were not significant(p＞.05). In the comparison of temporal parameter of gait between groups, the swing phase, stance phase, single support, double support was significant decreased in arthritis groups(p＜.05). In the comparison of spatial parameter of gaits between groups, BOS and step angles were significant increased in arthritis groups(p＜.05), in the velocity, stride length and FAP(functional ambulation profile) were significant decreased in arthritis groups (p＜.05) Conclusion：In the osteoarthritis disease patients gait showed temporal, spatial, general gait component variable changes comparison normal adults. therefore, it was seems to very important considerable function at gait training in clinical intervention.