Patent ID: 7524350

Claim:
A ceramic honeycomb structural body comprising one pillar shape porous ceramic member or formed by bundling a plurality of the ceramic members in which many cells as a gas path are arranged in parallel through cell walls in a longitudinal direction and one ends of these cells are sealed, characterized in that the cell wall is made from a sintered body having a pore structure that in a pore size distribution curve wherein an abscissa is a pore diameter (μm) and an ordinate is a log differential pore volume (cm 3 /g), when pores having a pore size ranging from 1.0 μm to about 150 μm are a first pore group and pores having a pore size ranging from about 0.006 or more to less than 1.0 μm are a second pore group, one peak in the pore size distribution is existent in the first pore group region and plural peaks in the pore size distribution are existent in the second pore group region.