Abstract: An ink pot device for an offset printing machine, comprising a fulcrum holder and an adjust piece that move back and forth, a link that is arranged between inner ends of said adjust piece and said fulcrum holder and eccentric cam that is equipped in the upper part of said link, in which ink keys are driven forwardly and backwardly to finely adjust the supply rates of ink, andAn ink pot device for an offset printing machine, comprising manual rotation knobs that are attached to a back/forth movable fulcrum holder and an adjust piece, in which ink keys are driven forwardly and backwardly to adjust the supply rates of ink, andAn ink pot device for a printing machine, comprising a stepping motor or a synchronous motor for driving said adjust piece, in which ink keys are driven forwardly and backwardly to adjust the supply rates of ink, andAn ink pot device for a printing machine, comprising engagement protrusion that are equipped on both side of a motor driving force transmission gear in such a manner as engageab