Intoeing gait may be caused by changes at any level of the lower extremities. The conditions which causes these abnormalities are calcaneovalgus, equinovarus, meatarsus varus deformity, bow leg, and spactic paralysis with overactivity of the internal rotator of the hip, etc. Authors studied 50 patients who had intoeing gait and 13 normal childrens prospectively from Apr. 1990 to Apr. 1992. For investigation of relationship between femoral anteversion, range of motion of lower extremities and intoeing gait, we divided by three groups as follows: Group A: 50 cases who had intoeing gait Group B: 26 cases who had physiologic bow or tibia vara in group A Group C: 13 cases who had normal gait There were CCH (12 cases), physiologic bowing (11 cases), tibia vara (15 cases), rickets (4 cases). cerebral palsy (3 cases), and foot deformity (5 cases), with average age of 29.86 months (ranging from 3 to 96 months) in group A, 30.1 months (range from 8 to 51 months). The femoral anteversion which is measured by computed tomography is right 34.03, left 35.30 degrees in group A, right 32.27, left 33.30 degrees in group B, and right 29.09, left 28.82 in group C. We calculated coefficients of each variable using SAS program, then the variables on effect of age was done ANCOVA test, the others enforcemented wilcoxon rank-sum test. Finally we choiced the significant variables and could be gained discriminant analysis. There were significant difference in anteversion (p<0.001), adduction of hip (p<0.001), flexion of ankle(p<0.05) between A, B, and C groups. We derived two formula from discriminant analysis using above described significant variables as follows: Between A, B and C groups (a) =-33+1.4x (anteversion)+0.2x (adduction)+0.35x (ankle flexion) (b)= -44+1.6x (anteversion)+0.8x (adduction)+0.22x (ankle flexion) (Example: Normal=a>b, Intoeing=a.