Patent ID: 7360875

Claim:
An inkjet head comprising: a flow-path unit including a plurality of plates that are stacked and define a common ink chamber and a plurality of ink flow paths communicating with the common ink chamber and a nozzle; and a piezoelectric sheet that is bonded onto one of the plates by an adhesive, wherein: the one of the plates defines, on one surface onto which the piezoelectric sheet is bonded, a first groove that extends in a first direction and is adjacent a first pressure chamber group, a second groove that extends in the first direction and is adjacent a second pressure chamber group, and a plurality of recess portions in a second direction, which intersects with the first direction; the recess portions are spaced from each other, and each connect the first groove to the second groove; and the first groove and the second groove allow the adhesive to escape when the piezoelectric sheet is bonded.