An assembled body of a vehicle may include a plurality of body parts, each of which forms a portion of the vehicle body, and forming the vehicle by being assembled during combination thereof; a magnetic module provided in each of the body portions and combining the plurality of body portions with each other by use of magnetic flow of the magnetic module; and a controller engaged to the magnetic module and configured for controlling a closed circulating magnetic path produced in the magnetic module such that the plurality of body portions is combined with each other to form the assembled body or to be separated from each other according to a control signal of the controller.