To realize both reduction of filter regeneration time and suppression of temperature rise of a filter without increasing emission of CO.

A plurality of an inlet side cells 4A having an inlet side opened and an outlet side sealed and a plurality of outlet side cells 4B having an outlet side opened and an inlet side sealed, are demarcated by porous partition wall 2 to be alternatively arranged. The inlet side cell 4A contains a first inlet side cell 4A1 having a PM combustion catalyst 10 carried and a second inlet side cell 4A2 having a CO oxidation catalyst 11 carried in addition to the PM combustion catalyst 10. A total carried amount of the CO oxidation catalyst 11 and the PM combustion catalyst 10 carried on the second inlet side cell 4A2 is set more than the PM combustion catalyst 10 carried on the inlet side cell 4A1. In the outlet side cell 4B, a catalyst which is same type as a catalyst carried on the second inlet side cell 4A2 is carried.