Abstract: To provide a medicine-bag printing apparatus provided with a conveying mechanism that can smoothly convey medicine bags and align them. A medicine bag (2 ) is printed by any one of a plurality of printers (11, 12 ) to be collected in a collecting portion (5 ) via a conveying route (6, 13, 14). The printing apparatus is provided with medicine-bag direction converting device (6, 14 ) which convert the direction of medicine bags printed by the respective printers so the printing surface and the printing direction become same.