An ink jet head comprising: a common ink chamber configured to store ink; a plurality of pressure chambers, each pressure chamber being configured to communicate with the common ink chamber via an injection hole such that ink is injected into the pressure chamber from the common ink chamber via the injection hole, the pressure chamber including a pair of pressure generation means and causing a volume fluctuation due to application of voltage to the pressure generation means; a nozzle corresponding to the pressure chamber configured to directly communicate with the pressure chamber and to serve as a flow path of ink ejected to outside from the pressure chamber; a nozzle-part discharge path configured to communicate with the pressure chamber near the nozzle inside the pressure chamber and to discharge ink out of the pressure chamber; and at least one discharge path (26b, 26c) configured to communicate with the pressure chamber at a position apart from the nozzle inside the pressure chamber and to discharge ink out of the pressure chamber, wherein the plurality of pressure chambers is arranged in series, and two partition walls in an arrangement direction of each pressure chamber are piezoelectric elements that are the pressure generation means, the ink jet head has pseudo pressure chambers arranged together with the pressure chambers and positioned on both sides of the pressure chambers, the pseudo pressure chambers causing a volume fluctuation in accordance with a volume fluctuation in the pressure chambers, and the discharge path (26b, 26c) and the nozzle-part discharge path are configured to communicate with a same one of the pseudo pressure chambers. a common ink chamber configured to store ink; a plurality of pressure chambers, each pressure chamber being configured to communicate with the common ink chamber via an injection hole such that ink is injected into the pressure chamber from the common ink chamber via the injection hole, the pressure chamber including a pair of pressure generation means and causing a volume fluctuation due to application of voltage to the pressure generation means; a nozzle corresponding to the pressure chamber configured to directly communicate with the pressure chamber and to serve as a flow path of ink ejected to outside from the pressure chamber; a nozzle-part discharge path configured to communicate with the pressure chamber near the nozzle inside the pressure chamber and to discharge ink out of the pressure chamber; and at least one discharge path (26b, 26c) configured to communicate with the pressure chamber at a position apart from the nozzle inside the pressure chamber and to discharge ink out of the pressure chamber, wherein the plurality of pressure chambers is arranged in series, and two partition walls in an arrangement direction of each pressure chamber are piezoelectric elements that are the pressure generation means, the ink jet head has pseudo pressure chambers arranged together with the pressure chambers and positioned on both sides of the pressure chambers, the pseudo pressure chambers causing a volume fluctuation in accordance with a volume fluctuation in the pressure chambers, and the discharge path (26b, 26c) and the nozzle-part discharge path are configured to communicate with a same one of the pseudo pressure chambers.