The present invention provides a vehicle motion control apparatus which is capable of optimally controlling the motion of a vehicle with the selection of a more optimal control object. When different control objects are controlled to realize the vehicle lateral motion control of the application request, the application request or vehicle state, and the availability of respective control objects calculated by an availability operation unit are used as a priority determination condition, and the selection timing for the control objects is determined based on the priority determination condition. That is, after a control object is first selected according to a request, if the application request or vehicle state, and the availability of respective control objects, which are a condition to determine the priority when control objects are selected, change, the control object is reconsidered and reselected based on the change in the priority determination condition. Accordingly, it is possible to more optimally select a control object and smoothly control the lateral motion of a vehicle.