In this study, we suggest a easy method to reason the distortion value of body of human by aging, as a new index of aging; which is "Distortion age", measured by the robot "DOCTORS EYE" which equip the "Kinect". As the result, we found the more significant difference of the distortion in front‐back direction of elderly participants between the standing and walking states than the distortion of young participants, and clarified the necessity of measurement of the deference for a precise evaluation of the distortion and the effectiveness of the easy measurement method of the distortion during walking, such as Kinect we applied. Also as the results of the analysis of the relationship between the aging and the physical distortion, we found the 2 kinds of positive correlations between age of the elderly participants and the depth value between the positions of head and shoulder, and between the aged and the value of differences between the depth value of standing and walking states. Finally, based on these 2 correlation, we proposed a model to estimate the "Distortion age" of elderly people for an easy engineering application.
