| 摘要 |
There is provided a honeycomb structure 100 provided with: a honeycomb structured portion 4 having partition walls 8 separating and forming a plurality of cells 1 and having a plurality of partial segments 3 separated and formed by a plurality of slits 2 extending along a cell 1 extension direction and being open on an end face on one side, and a buffer portion 5 disposed in the slits 2. In a cross section perpendicular to the cell 1 extension direction, each of the partial segments 3 is formed by a first region 11 having an outer periphery surrounded by a boundary wall formed by smoothly connecting a straight line and a curving line and a second region 12 being located to be adjacent to the first region 11 on the outside thereof and having a corner portion 13, and an R portion 15 as an arc-shaped portion of the boundary wall 14 is disposed inside the position having the corner portion 13 of the second region 12 of each of the partial segments 3, and the R portion of the boundary wall 14 has an arc shape having a radius of 1.5 to 10 mm, and the thickness of the boundary wall is 1.1 to 2.0 times the thickness of the partition wall.
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