A vehicle motion control apparatus suppresses strangeness feeling in a driver when a signal from a sensor which detects an operated state quantity of a vehicle and a motional state quantity thereof is abnormal. The vehicle motion control apparatus includes a control unit, and sensors. An actual-state-quantity obtaining unit outputs a vehicle-body actual slip angle and an actual yaw rate to a deviation calculating unit. A reference dynamic-characteristic model calculating unit calculates a vehicle-body reference slip angle and a reference yaw rate using a dynamic-characteristic model and outputs those to the deviation calculating unit. A virtual external-force calculating unit feeds back a virtual external force to the reference dynamic-characteristic model calculating unit based on a deviation output by the deviation calculating unit. At this time, a virtual-external-force-calculation controlling unit controls correction of a virtual external force based on a signal indicating a detection condition output by the sensors.