A method for manufacturing a honeycomb structured body according to the present invention comprises manufacturing a pillar-shaped honeycomb molded body having a large number of cells longitudinally placed in parallel with one another with a cell wall therebetween; forming a honeycomb fired body by degreasing and firing the honeycomb molded body; and binding a plurality of the honeycomb fired bodies by interposing a sealing material layer, and further comprising: drawing information on a side face of the honeycomb molded body and/or the honeycomb fired body, prior to said binding, said information drawn in form of at least one of a graphic, a symbol, a character, a barcode and a two-dimensional code.