Patent ID: 7326271

Claim:
A honeycomb filter comprising a cylindrical honeycomb structure including a plurality of cells which are partitioned by porous partition walls in a honeycomb shape and function as fluid channels, and first plugging members disposed to alternately plug openings of predetermined cells on a side of one end face of the honeycomb structure and openings of the remaining cells on a side of the other end face of the honeycomb structure in checkered flag form; the fluid which flows into the cells being capable of being discharged through the partition walls which function as a filtration layer, wherein the honeycomb filter further comprises second plugging members disposed to plug the openings of the cells which are open without being plugged by the first plugging members on the side of the one end face or the side of the other end face of the honeycomb structure corresponding to 0.2 to 2.5% of an area of a cross section perpendicular to a center axis of the honeycomb structure in a center section occupying at least ⅔ of an area from the center axis of the honeycomb structure to an outer circumferential surface, wherein heat capacity of the second plugging members is higher than heat capacity of the first plugging members.