| 摘要 |
Two reservoirs (3, 4) are formed with a pressure-generating chamber (2, 2) being sandwiched therebetween. The pressure-generating chamber (2) communicates with at least either one of the reservoirs (3, 4) through an ink-feeding port (5, 6). Neighboring nozzle communication holes (7, 8) are arranged at nearly symmetrical positions on both sides of a central point of the pressure-generating chamber (2) in the lengthwise direction, being staggered in the lengthwise direction of the pressure-generating chamber (2). A partitioning wall separating the nozzle communication holes (7, 8) that are through holes from the pressure-generating chamber (2), has a height (M) nearly equal to that of a partitioning wall (N) of the pressure-generating chamber (2). Even when the pressure-generating chambers are highly densely arranged, therefore, it is possible to prevent a crosstalk caused by the partitioning wall separating the nozzle communication holes.
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