To markedly reduce impurities generated at the offset printing.

In an inking arrangement 5, the ink rollers 3.1-3.4 coming into contact with a transfer roller and form rollers 4.1-4.4 to be rotated in a shape connective state can be driven at a peripheral speed different from that of a plate cylinder 2 and the ink roller 3.3, 3.1 arranged so as to be separated from the plate cylinder 2 can be driven with peripheral speed difference larger than that of the ink rollers 3.2, 3.4 arranged in adjacent relation to the plate cylinder 2 and these ink rollers 3.2, 3.4 are in contact with the form rollers 4.1-4.4 susceptible to vibrating motion in a frictionally connective state.