A honeycomb structure includes a porous partition wall defining a plurality of cells, wherein the plurality of cells include a first cell and a second cell, on the partition wall disposed to surround the at least one first cell, a protrusion is each provided with, the first protrusion and the second protrusion are each disposed to at least partially overlap with each other on extended lines in extending directions of the respective protrusions, and an inter-protrusion length (X) of a distal end of the first protrusion and a distal end of the second protrusion is equal to or more than 10% and equal to or less than 70% with respect to a mutual distance (W) from the one part to the other part on the partition walls facing each other.