This study is purpose to present the specification of gait such like step length, stride width, change of stride length, body-oriented static right-left ratio and average pressure & maximum pressure by the %fat when female middle school students are gait, subjects to female middle school students. To conduct this study, the change of step length, stride width, and stride length are comparative analyzed by using stick figures which collected through image analysis, and to be comparative analyzed body-oriented static right-left ratio and average pressure & maximum pressure by using DINATTO system Ver 2.5. The following results are shown like this. 1) The difference of step length, stride width, and stride length right-left ratio Among the step length, stride width, and stride length by the %fat has no significant difference in three groups. 2) The difference of body-oriented static right-left ratio by the %fat. Three groups have no significant difference in the body-oriented static right-left ratio by the %fat. 3) The difference of average pressure and maximum pressure by the %fat. Three groups have significant difference in the average pressure and maximum pressure by the %fat, the average pressure and maximum pressure are shown the highest in the above 30% groups.