A honeycomb structure includes latticed partition walls defining a plurality of polygonal cells which extends from one end face to the other end face and forms through channels for fluid, the partition walls are porously formed by using aggregates and a bonding material different from a material of the aggregates, and the partition walls have a relation indicating that a surface porosity of a surface region from a partition wall surface of each of the partition walls to a depth of 15% of a partition wall thickness T and an inner porosity of an inner region from the partition wall surface to a depth of 15% to 50% of the partition wall thickness are different from each other, and a difference obtained by subtracting the surface porosity from the inner porosity is in excess of 1.5%.