| abstract |
A honeycomb structured body (21) for preventing cells in a filter peripheral portion from being clogged. The honeycomb structured body includes a filter core portion (21A) having a rectangular cross-section and a filter peripheral portion (21B) arranged outside the filter core portion. The honeycomb structured body has a circular cross-section. In the honeycomb structured body, filling layers (35) are arranged in lieu of small honeycomb members that have extremely small vertical cross-sectional areas. |