The present invention relates to a vehicular air cleaner. It is an object to provide a DOR (Direct Ozone Reduction) system for suppressing deterioration of a purifying function of an ozone purifying material. Active oxygen is produced by an ozone purifying function of activated carbon. The probability that the active oxygen contacts with a fin 20 of a radiator 14 on a rear surface side is higher than that on a front surface side of the radiator 14. Accordingly, the activated carbon on the rear surface side of the radiator 14 is easily oxidized as compared with the activated carbon on the front surface side. Therefore, in the fin 20, a coating amount of the activated carbon on the front surface side of the radiator 14 is adjusted to be larger than a coating amount of the activated carbon on the rear surface side. Thus, the probability that the active oxygen contacts with the activated carbon can be reduced.
