Patent ID: 7309370

Claim:
A honeycomb filter for purifying exhaust gases, comprising: a ceramic block comprising a plurality of columnar porous ceramic members each having a plurality of partition walls and a plurality of through holes separated by the partition walls and extending in parallel with one another in a longitudinal direction of the columnar porous ceramic members, the through holes including ones plugged on an inlet side of the ceramic block and ones plugged on an outlet side of the ceramic block, the ceramic block having a circumferential surface extending in the longitudinal direction between the inlet side and the outlet side; an adhesive layer adhering and interposed between the columnar porous ceramic members; and a sealing layer sealing the circumferential surface of the ceramic block, wherein the adhesive layer and the columnar porous ceramic members satisfy a relationship, 0.01<|α L −α F |/α F <1.0, where α L is a thermal expansion coefficient of the adhesive layer and α F is a thermal expansion coefficient of the columnar porous ceramic members.