A honeycomb filter, wherein when a thermal expansion coefficient at 300 to 600° C. of a material constituting a honeycomb substrate is indicated by A (×10−6/° C.), the four-point bending strength of the material constituting the honeycomb substrate is indicated by B (MPa), the thickness of a thinnest portion in a portion partitioning outlet plugging cells of a partition wall 1 is indicated by t (mm), the thickness of a portion partitioning an outlet plugging cell and an inlet plugging cell of the partition wall is indicated by WT (mm), and the distance between the center of the outlet plugging cell and the center of the inlet plugging cell adjacent to each other is indicated by CP (mm), a relation of the following equation (1) is satisfied. 0.714×WT+0.160≧t/CP≧0.163×A/B+0.105  (1)