Patent ID: 8709349

Claim:
A wall flow type exhaust gas purification filter comprising: a honeycomb structure having porous ceramic partition walls separating and forming a plurality of cells extending from one end portion to the other end portion and functioning as exhaust gas passages, and plugging portions disposed in one side opening end portions of predetermined cells and the other side opening end portions of the other cells, wherein, when an average pore size is obtained for each region of ⅓ mm×⅓ mm in a range of 10 mm 2 in an arbitrary cross section parallel to a surface of the partition walls, a large pore region having an average pore size of 15 μm or more has an area of 0.1 mm 2 or more, and a small pore region having an average pore size of 8 μm or less has an area of 0.1 mm 2 or more, wherein the average pore size is measured before the catalyst is loaded on the partition walls.