Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein, in a pore diameter distribution of the partition wall, in the case where the pore diameter (µm) whose cumulative pore volume is 10% of the total pore volume is denoted by D10, the pore diameter (µm) whose cumulative pore volume is 50% of the total pore volume is denoted by D50, and the pore diameter (µm) whose cumulative pore volume is 90% of the total pore volume is denoted by D90, all of the following equations (1) to (6) are satisfied. 8 .4 ? ? m<D10 ­­­(1) 17 .5 ? ? m<D50<24 .0 ? ? m ­­­(2) D90<55 .2 ? ? m ­­­(3) logD90-logD10 / logD50 <0 .60 ­­­(4) logD90 / logD50 <1 .30 ­­­(5) logD50 / logD10 <1 .

Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein, in a pore diameter distribution of the partition wall, in the case where the pore diameter (µm) whose cumulative pore volume is 10% of the total pore volume is denoted by D10, the pore diameter (µm) whose cumulative pore volume is 50% of the total pore volume is denoted by D50, and the pore diameter (µm) whose cumulative pore volume is 90% of the total pore volume is denoted by D90, all of the following equations (1) to (6) are satisfied. 3.9 ? ? m<D10 ­­­(1) 10.5 ? ? m<D50<16 .6 ? ? m ­­­(2) D90<38 .7 ? ? m ­­­(3) log ? D90-logD10 / log ? D50<0 .80 ­­­(4) log ? D90 / logD50<1 .36 ­­­(5) log ? D50 / logD10<1 .

Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall disposed to surround a plurality of cells which serve as fluid through channels extending from a first end face to a second end face and a plugging portion provided at an open end on the first end face side or the second end face side of each of the cells, wherein the partition wall has an average number of branches of pores existing at the outermost surface of the partition wall of greater than 7.5 and less than 9.0.