Abstract: A vehicle roof top carrier having a base which is secured removably to the roof rack of a vehicle. A hard, aerodynamically shaped cover closes over the base, thereby protecting the contents of the carrier from the elements. The base has a plurality of downwardly opened channels to enable the base to fit over the vehicle roof rack and in close proximity to the vehicle roof. Removable fastening devices, protectably disposed within the carrier, secure elements of the rack within the channels to hold the carrier securely and removably in place over the rack. Thus, when the cover, which can be locked to the base, is in its closed position, the means of attachment of the base to the vehicle roof rack is protected from access by unauthorized persons.