The present invention relates to a vehicle roof box for forming a useful interior space, a vehicle loop having a roof box, and a vehicle incorporating a roof box. The present invention provides a volume change means for changing the volume of the internal space (6) in order to allow the user to conveniently use the roof box (1) having a large storage space as possible, and at the same time can reduce vehicle noise and fuel consumption. Is provided, the roof box 1 provides a vehicle roof box which is integrally formed in the roof of the vehicle.
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