Patent ID: 7347522

Claim:
An ink-jet head, comprising: 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.