Diesel particulate filter

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PROBLEM TO BE SOLVED : To provide a diesel particulate filter capable of effectively burning PM while suppressing the amount of catalyst noble metal to be used and capable of suppressing a discharge of carbon monoxide. SOLUTION : In a diesel particulate filter which is arranged at an exhaust passage of a diesel engine and which keeps a particulate oxidation catalyst having a catalyst noble metal arranged to burn particulates, the particulate oxidation catalyst includes a zirconium as a principle component, a zirconium multiple oxide containing a rare-earth metal except a cerium, and an alumina. The zirconium multiple oxide and the alumina each carry a catalyst noble metal. COPYRIGHT : (C)2007, JPO&INPIT