| 摘要 |
<p>An object of the present invention is to provide a honeycomb structured body comprises a plurality of pillar-shaped honeycomb fired bodies combined with one another with an adhesive layer interposed therebetween, each of the honeycomb fired bodies having a large number of cells longitudinally placed in parallel with one another with a cell wall therebetween and an outermost peripheral face surrounded by an outer wall, wherein the cell wall has a thickness of 0.15 to 0.30 mm, a border wall formed by the adhesive layer and the outer walls of the two honeycomb fired bodies positioned on both sides of the adhesive layer, a thickness of the border wall is 5 to 20 times greater than the thickness of the cell wall, and a catalyst permeation preventive region is provided in the outer wall or between the outer wall and the adhesive layer, the catalyst permeation preventive region containing at least one kind selected from the group consisting of a water repellent material, a cation exchanger and a water absorbing material.
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