A honeycomb structure includes a plurality of honeycomb fired bodies. Each of the plurality of honeycomb fired bodies has a longitudinal direction and cell walls extending along the longitudinal direction to define cells. An adhesive layer is provided between the plurality of honeycomb fired bodies to connect the plurality of honeycomb fired bodies so that each longitudinal direction is substantially in parallel with each other. The plurality of honeycomb fired bodies include at least one center-portion honeycomb fired body located at a center portion of the honeycomb structure and at least one periphery honeycomb fired body surrounding the center-portion honeycomb fired body to form a peripheral face of the honeycomb structure. The periphery honeycomb fired body includes contact faces contacting the adhesive layer. At least one of the contact faces has irregularities.