Patent ID: 7401905

Claim:
An ink-jet head comprising: a plurality of nozzles for ejecting ink; a plurality of pressure chambers provided correspondingly to the respective nozzles and connected to the nozzles; a common ink chamber for distributing and supplying ink to the pressure chambers; a supply passage for supplying the ink to the common ink chamber; and a plurality of connection passages provided correspondingly to the respective pressure chambers, one ends of which are connected to the common ink chamber through a plurality of first openings and the other ends of which are connected to the respective pressure chambers through a plurality of second openings; wherein among the first openings, an opening positioned at a most downstream end in a flowing direction of the ink from the supply passage in the common ink chamber is positioned to be spaced apart from an end of the common ink chamber at the most downstream side by at least one pitch of alignment intervals of the first openings, the plurality of first openings being aligned in a straight line, wherein the ink flows through the common chamber in substantially only one direction.