PURPOSE: To relieve interference between pressures in ink-jetting units and enhance recording quality and its speed, by providing pressure dampers at parts of an ink-supplying passage at which a plurality of ink-jetting units are connected to each other.

CONSTITUTION: The dampers 6 are provided at respective parts of the ink- supplying passage 5 at which nozzles 1 or ink passages 2 (which are component elements of the ink-jetting units) are connected to each other. As a result, when an ink in a pressure chamber is pressurized, the effect of the pressure energy on the other ink-jetting units can be relieved. Accordingly, recording quality and its speed can be enhanced.