Patent ID: 8722172

Claim:
A honeycomb structure comprising porous partition walls by which a plurality of cells that define through channels of a fluid are partitioned and in which a plurality of pores are formed, wherein respective ends of each of the plurality of cells are open; wherein in sections of the partition walls cut perpendicular with respect to an extending direction of the cells, a ratio of the sum of areas of inscribed circles having diameters of 90 μm or larger among inscribed circles drawn in the pores in the sections, with respect to the total area of all the pores in the sections, is from 10 to 50%, and wherein in each of the partition walls, pores having pore diameters larger than a thickness of the partition wall, in a section thereof which is perpendicular to an extending direction of the cells, are formed to occupy 4 to 11% of the total volume of the pores formed in the partition wall.