| 摘要 |
PROBLEM TO BE SOLVED: To provide a head unit in which a plurality of unit heads having nozzle arrays are arranged on both surface sides of a transmission substrate without forming a complicated liquid flow passage, and a liquid jetting device including the same.SOLUTION: A head unit 2, where unit head arrays comprising by arraying unit heads are provided in parallel on both sides of a transmission substrate 22 respectively, has: a first liquid flow passage 32a arranged on one side of the transmission substrate 22; and a second liquid flow passage 32b arranged on the other side. The unit head includes: a flexible cable; a first head flow passage provided on the other side from the transmission substrate 22 side with the flexible cable sandwiched in-between; and a second head flow passage provided on the transmission substrate 22 side. The first head flow passage communicates with the liquid flow passages 32a and 32b on one side of the surface where the unit heads are arranged, and the second head flow passage communicates with the liquid flow passages 32a and 32b on the other side of the surface opposite from the unit head, striding over the transmission substrate 22. |
