A honeycomb structure 1 of the present invention includes: a cylindrical cell structure 2 having porous partition walls and a plurality of cells separated and formed by the partition walls and functioning as fluid passages, and an outer peripheral coat layer 3 disposed so as to cover the outer periphery of the cell structure 2, and the outer peripheral coat layer 3 has an outer peripheral coat portion 6 disposed so as to cover the outer periphery of the cell structure 2 and a protruding portion protruding outside from an end face 8 of the cell structure 2 and disposed so as to cover the outside portion on the end face 8 of the cell structure 2. In the honeycomb structure 1 of the present invention, the outer peripheral coat layer 3 is effectively inhibited from being damaged and peeled.