PURPOSE: To facilitate the handling and the maintenance, print in high quality, embody the start of printing in a short time and reduce the spoilage.

CONSTITUTION: An ink and water supplying apparatus 20 comprises first, second rollers 51, 56 for feeding ink and water to a plate cylinder 11, first, second covers 60, 70 covering at infinitesimal gaps 61, 71 on the outer peripheries of the rollers 51, 56, a plurality of ink discharge units and a plurality of water discharge units respectively opened inside the covers 60, 70, and ink supply means 30 and water supply means 40 for respectively supplying the ink and the water to the ink discharge units and the water discharge units.