Patent ID: 7252370

Claim:
An inkjet printing head comprising: an actuator unit; and a flow path unit onto whose surface the actuator unit is fixed, the flow path unit including: a common ink chamber having a plurality of outlets, the common ink chamber being provided at a side opposite to the actuator unit with respect to a plurality of pressure chambers; a plurality of individual ink flow paths having the plurality of pressure chambers of which the volumes are changed by the actuator unit, the individual ink flow paths for leading ink from the respective outlets of the common ink chamber to respective nozzles through respective pressure chambers, the pressure chambers arranged along a plane in a form of matrix and each connected to the respective nozzles, the individual ink flow paths being classified into a plurality of types in accordance with facing area between the pressure chambers thereof and the common ink chamber; and a plurality of adjustment portions provided at a side opposite to the actuator unit with respect to the pressure chambers and adjust compliances of each of the pressure chambers belonging to the classified types of the individual ink flow paths to be equalized.