Ink-jet head and image recording apparatus

An image recording apparatus, comprising:

• an ink cartridge;
• and
• an ink-jet head which comprises:
• a flow passage unit having a plurality of nozzles and a plurality of pressure chambers respectively communicating with the nozzles the pressure chambers being arranged along a planar surface of the flow passage unit;
• an energy transfer unit which is fixed to the planar surface of the flow passage unit and transfers ejection energy to ink in the plurality of pressure chambers;
• a driver IC which generates a driving signal supplied to the energy transfer unit;
• a flat flexible cable in which the driver IC is mounted and a plurality of wirings that make connection between the driver IC and the energy transfer unit are formed;
• and
• a heat transfer body which sandwiches at least a part of the energy transfer unit between the heat transfer body and the planar surface of the flow passage unit, the heat transfer body having a thickness in a direction perpendicular to the planar surface, the thickness decreasing in a direction away from the driver IC.