The present invention relates to a motor for a vehicle and a rotor applied thereto, wherein the rotor includes a first rotor core having a plurality of magnet contact surfaces in a first direction that is a longitudinal direction, second rotor cores positioned to face the plurality of magnet contact surfaces, a plurality of magnets positioned between the first rotor core and the second rotor cores, and a partition unit disposed between the magnets adjacent to each other and configured to fix the second rotor cores and the magnets.