The utility model relates to an ink jetting head which comprises a passage unit which comprises a plurality of pressure chambers. One end of each of the pressure chambers is connected with a nozzle and the other end is connected with an ink supply source. The pressure chambers are arranged in a mutual abutting way along a plane. In order to change the volumes of the pressure chambers, a plurality of executing units are fixed on one surface of the passage unit. Each of the executing units is provided with a plurality of pressure generating parts which correspond to and span the pressure chambers. Moreover, the pressure generating parts are arranged along the lengthwise direction of the passage unit, which causes that each two adjacent executing units are partially overlapped along the width direction of the passage unit. The utility model is also provide with primary areas formed by the pressure generating parts in a short array way and adjacent adding areas which correspond to the primary areas along the width direction of the passage unit. Each of the adding areas is an area formed by an interstice part between one pressure generating part in each of the primary areas and another pressure generating part in each of the primary areas of another adjacent executing unit.