To control dispersion of a print thickness caused by cohesion and drying of ink when printing using the ink which is high in cohesion and a quick drying property, is carried out.

Ink is fed to an anillox roller 4 from an ink feed opening 12 while vibration is applied with an ultrasonic vibrator 17. Vibration is applied to the remaining ink 20c cohered in a cell 4a, which is dispersed again to the ink 20d to be newly fed. A feed quantity of the ink 20a under an uncohesive state to the anillox roller 4 is kept constant independent of generation of ink cohesion, and a quantity of the ink 20b to be transferred to a flexographic plate 7 from the cell 4a of the anillox roller 4 is kept constant. Then, when printing is carried out by using the ink which is high in cohesion and quick drying property, dispersion in a print thickness to be caused by the cohesion and drying of ink is controlled, and precise printing can be continuously carried out.