The present invention relates to an air cleaner for a vehicle. It is an object to provide a DOR system which can favorably suppress deterioration of a function of an ozone purifier containing ozone purifying catalyst and activated carbon. A core part of a radiator 14 includes a fin 20, an activated carbon layer 22, and an ozone purifying catalyst layer 24. The activated carbon layer 22 is made of activated carbon and a binder A for bonding the fin 20 and the activated carbon. The ozone purifying catalyst layer 24 is made of an organometallic complex and a binder B bonding the activated carbon layer 22 and the organometallic complex. The binder B used for the ozone purifying catalyst layer 24 has a larger specific surface area than that of the binder A used for the activated carbon layer 22.
