PURPOSE: To realize the miniaturization and cost reduction due to the simplification of constitution while enhancing user's convenience and maintenance properties.

CONSTITUTION: Ink N is applied to a plate from an ink container part 2 housing the ink N through an ink distributing roller mechanism R and, especially, the coating port part 3 communicating with the lower part of the ink container part 2 is provided and the coating roller 4 brought into contact with the first roller R1 of the ink distributing roller mechanism R to apply the ink N to the first roller R1 is housed in the coating port part 3 in a freely revolvable manner.