When a vehicle runs, the vibration that a road surface causes brings about discomfort of the driver and consumption of the surplus fuel. When a road surface state is bad, it is necessary to detect the irregularity of the road surface. For example, they photograph the dispersion dynamic scattering pattern that inspection light was scattered in on a road surface with a camera and detects having irregularity or not of the road surface and detects the irregularity by a millimeter wave sensor. However, they judge only an irregularity and does not think about the influence on body. In this study, we measure run data and detect the irregularity of the road surface.