To provide a gravity segmentalization control device for a three-dimensional acceleration value, configured to reduce or eliminate an increase in risk to an occupant and traveling, by regulating quickly inclinations and heights of a vehicle and a seat to be brought into point symmetry in three-dimensional coordinates with respect to acceleration, when the acceleration not for braking is detected in the vehicle and the occupant.

The gravity segmentalization control device for the three-dimensional acceleration value includes a base with a function to calculate high-speed information of a single body acceleration sensor as three-dimensional acceleration values of XYZ axes, to control individually pressurization and decompression for a damper, on the basis of the three-dimensional acceleration values, to change thereby the heights and angles of the vehicle and the seat always, and to cancel thereby the acceleration in a current traveling state or a registered traveling state.