Particulate filter

A particulate filter disposed in an exhaust path of an internal combustion engine and used to collect particulate matter from exhaust gas discharged from the internal combustion engine, the particulate filter comprising:

• a substrate having a wall flow structure including a porous partition wall partitioning an inlet cell that includes an open end portion on an exhaust gas inflow side and an outlet cell that is adjacent to the inlet cell and has an open end portion on an exhaust gas outflow side;
• and
• a wash coat layer formed inside the partition wall, wherein
• the wash coat layer is held on surfaces of internal pores of the partition wall,
• among the internal pores of the partition wall,
• an average filling rate A of the wash coat layer held in a first pore group having a pore diameter of 5 μm or more but less than 10 μm,
• an average filling rate B of the wash coat layer held in a second pore group having a pore diameter of 10 μm or more but less than 20 μm, and
• an average filling rate C of the wash coat layer held in a third pore group having a pore diameter of 20 μm or more satisfy relationship below:
• A<B<C;
• and B≤40%,
• among pores of the first pore group and the second pore group, in which a proportion of pores having a wash coat layer filling rate of 75% or more is 35% by number or less,
• the wash coat layer is formed in a region that occupies 50% or more of a thickness of the partition wall from at least a part of a surface of the partition wall facing at least one of the inlet cell and the outlet cell, and
• an amount of a noble metal catalyst carried by the wash coat layer is 0 g/L or more but 0.2 g/L or less, wherein
• the average filling rate A satisfies 10%≤A≤35%,
• the average filling rate B satisfies 15%≤B≤40%, and
• the average filling rate C satisfies 20%≤C≤45%.