Ink-jet head having passage unit and actuator units attached to the passage unit, and ink-jet printer having the ink-jet head

An inkjet head comprising:

• nozzles from which ink is ejected;
• pressure chambers which are connected with the nozzles so as to allow liquid to circulate;
• a common ink chamber which is configured to store the ink which is supplied to the pressure chambers;
• and
• apertures which are configured to connect the pressure chambers with the common ink chamber so as to allow the liquid to circulate and are configured to restrict an amount of the ink supplied from the common ink chamber to the pressure chambers, wherein,
• the inkjet head further comprises pressure chamber lines which are formed of the pressure chambers connected with a same common ink chamber and extend in a longitudinal direction of the inkjet head,
• the pressure chamber lines include a first pressure chamber line, a second pressure chamber line, a third pressure chamber line, and a fourth pressure chamber line which are lined up in this order from one side in a lateral direction orthogonal to the longitudinal direction of the inkjet head and which neighbor one another,
• the inkjet head further comprises aperture lines which are formed of the apertures connected with the same common ink chamber and extend in the longitudinal direction,
• the aperture lines include:
• a first aperture line which connects the pressure chambers forming the first pressure chamber line with the common ink chamber, a second aperture line which connects the pressure chambers forming the second pressure chamber line with the common ink chamber, a third aperture line which connects the pressure chambers forming the third pressure chamber line with the common ink chamber, and a fourth aperture line which connects the pressure chambers forming the fourth pressure chamber line with the common ink chamber, and
• the second aperture line is closer to the fourth pressure chamber line than to the third aperture line in the lateral direction, whereas the third aperture line is closer to the first pressure chamber line than to the second aperture line in the lateral direction.