Honeycomb filter

A honeycomb filter comprising:

• a honeycomb substrate that is pillar-shaped and has porous partition walls disposed so as to surround a plurality of cells each of which serves as a fluid through channel extending from an inflow end face of the honeycomb substrate to an outflow end face of the honeycomb substrate,
• an outer peripheral coating layer disposed so as to surround an outer periphery of the honeycomb substrate, and
• plugging portions that are disposed at any one of ends on the inflow end face and ends on the outflow end face, of the plurality of cells, wherein,
• the outer peripheral coating layer has an inflection point at which expansion in thermal expansion behavior of the outer peripheral coating layer turns to contraction and a temperature T1 of which is 1000 to 1500° C.,
• the outer peripheral coating layer has a porosity P1 of 36 to 48%, and a thermal expansion coefficient C1 between 40 to 800° C. of 2.5 to 3.5×10−6/° C.,
• a surface roughness Ra of the outer peripheral coating layer is 10 to 25 μm, and a thermal expansion coefficient C2 between 4° and 800° C. of the honeycomb substrate is 0.2 to 1.5×10−6/° C.