Dynamic postural control ability is necessary for fall prevention in our daily lives. It has been suggested that dynamic postural control ability is highly related to the muscles in the trunk as well as the lower limbs for the keep and move of the body. In this study, we reveal relationship between dynamic postural control ability and abdominal area. Subjects including 31 middle-aged people consist of 12 men and 19 women (mean age 60.0±7.6 years). We measured visceral fat area and cross-sectional area of the trunk muscle using abdominal computed tomography scan. The unstable tilt board is used for measuring dynamic postural control ability. Through multiple regression analysis, it is possible to relate dynamic postural control ability from gender, visceral fat, and deep trunk muscle such as psoas major muscle on abdominal computed tomography scan. It is considered that dynamic postural control ability involved not only increasing the volume of deep trunk muscle but also decreasing the amount of visceral fat.