A puncture repair device comprises a compressor and a vessel supplied with compressed air by the compressor and containing puncture repair liquid to be pumped to a cavity of a tire. According to the foregoing arrangement, it is possible for the storage system to have satisfactory scalability capable of coping with the expansion of band of the network at a low cost. When the arrangement is in a mounting position the secondary gearwheel is secured in an axial direction. The thin film may be responsive to a magnetic field applied to the thin film such that varying the magnetic field varies the polarization of the light beam reflected off of the surface of the thin film.