To solve the problem that the conventional technique requires many intricate devices and its controlling, consequently has a high probability of the trouble of the devices, makes their maintenance and controllings complicated, and needs a large installation space.

This ink supply device comprises every one set, which consists of a vibrating roller provided reciprocatively between an ink fountain roller and an ink distributing roller, a vibrating roller moving part for controlling the reciprocating motion of the vibrating roller, and a detecting part for detecting the position of the vibrating roller, wherein a controlling part, which receives signal sent from the detecting part and sends a driving signal to the vibrating roller moving part. The detecting part sends signals to the controlling part at every detection of each vibrating roller, while the controlling part sends a driving signal to the vibrating roller moving part so as to make the mutual contact timings between the vibrating roller and the ink distributing roller of both the sets adjustable by this ink supply device of the printing machine.