Patent ID: 7678439

Claim:
A honeycomb structure, comprising: a cell structure section including a plurality of cells partitioned by a plurality of partition walls; and an outer circumferential wall section surrounding the cell structure section; wherein the cell structure section includes a first partition wall group having the partition walls positioned in parallel, and a second partition wall group having the partition walls which intersect the partition walls of the first partition wall group at right angles and are positioned in parallel, each of the partition walls connecting two different locations of the outer circumferential wall section through one continuous plane; wherein partition wall intervals of each of the partition wall groups positioned in parallel are varied stepwise in at least a part of the cell structure section, and at least some of the plurality of cells have a rectangular cross-sectional shape; and wherein all the partition walls have such a ratio of a cell side length to a partition wall thickness that the partition wall can withstand pressure during canning.