A motion control device for a vehicle includes a vehicle speed obtaining device, a curvature obtaining device for obtaining a bending grade of a curve existing ahead of the vehicle, a position obtaining device for obtaining a relative position between the vehicle and the curve, a determination device for determining an appropriate vehicle speed for the vehicle passing through the curve based on the bending grade, a speed reduction control device for executing a speed reduction control for reducing the vehicle speed based on the vehicle speed and the relative position so that the vehicle passes through the curve at the appropriate vehicle speed, and a gradient obtaining device for obtain a gradient of the road on the curve existing in a traveling direction of the vehicle, wherein the determination device determines the appropriate vehicle speed based on the gradient of the road in addition to the bending grade.