Liquid ejecting apparatus

A liquid ejecting head comprising:

• a plurality of flow channel units, each of which includes a pressure generating chamber operable to generate pressure therein and a nozzle plate formed with a nozzle;
• a plurality of drive units, each of which includes a piezoelectric vibrator operable to apply a pressure vibration to the pressure generating chamber, and which correspond to the plurality of the flow channel units, respectively;
• and
• a head casing to which the plurality of the flow channel units and the plurality of the drive units are fixed and which includes a plurality of attachment parts, wherein
• the first one and the second one of the plurality of the flow channel units are staggered;
• the first one of the plurality of the attachment parts are arranged in a square which is minimum square of squares including all flow channel units, when these are projected onto plane which is include a surface of the nozzle plate.