The exhaust gas purification filter

Suitable for being arranged in an exhaust passage of an internal combustion engine, the exhaust gas purification filter (4) for trapping particulate matter contained in exhaust gas, the exhaust gas inflow passages and exhaust gas are alternately arranged comprises an outflow passage, and they separate the exhaust gas inflow passages and exhaust gas outflow passages together porosity of the partition walls (6). The partition wall, the partition wall substrate surface covered by coated areas (CZ) by minor coat layer than the average pore diameter of the average pore diameter of the partition wall substrate, the partition wall substrate surface at a downstream side of the coating region by the coating layer not covered with the uncoated region (NCZ) is partitioned. Ash contained in the exhaust gas in the non-coated regions are set pore size of the partition wall so as to pass through the partition wall. Flow resistance in the thickness direction of the partition wall portion located on coating area is smaller than the flow path resistance in the thickness direction of the partition wall portion located on the non-coated area.