| abstract |
An exhaust gas purification filter has a honeycomb structure body and upstream side plug members. Cell holes are composed of inlet cell holes and outlet cell holes. In a central area and an outer peripheral area, a gas flow channel cross sectional area Sc 1 of the outlet cell holes is larger than a gas flow channel cross sectional area So 1 of the inlet cell holes, where Sc 1 <So 1 . A first ratio Rc is smaller than a second ratio Ro. The first ratio Rc is a ratio of Sc 1 and Sc 2 . The second ratio Ro is a ratio of So 1 to So 2 . In a first direction X and a second direction Y, the inlet cell holes and the outlet cell holes are alternately arranged, and the cell walls in the central area are larger in thickness than the cell walls in the outer peripheral area. |