This tablet 3 has a first display layer 51 which is printed with visible ink and a second display layer 52 which is printed with invisible ink. Text a trademark or the like is printed on the first display layer 51 using visible ink and can be visually confirmed by a manager or tablet user. A barcode or the like is printed on the second display layer 52 using invisible ink and cannot be seen by the manager or tablet user. The second display layer 52 can be revealed and read using a blacklight or the like. The tablet 3 is printed using a tablet printing device 1 that is provided with transport disks A-C that transport the tablet 3 while supporting a side surface 7 by suction and the first display layer 51 is printed by an inkjet head 4 and the second display layer 52 is printed by an inkjet head 5.
