Patent ID: 8057015

Claim:
A liquid ejecting head unit, comprising: a plurality of liquid ejecting heads, each including: a nozzle array in which a plurality of nozzle openings are arranged in a first direction, a liquid passage port with an open inner passage and to which an external passage is connected, and a connector to which an electric signal is supplied; a platform on which the plurality of the liquid ejecting heads are mounted in the first direction and a second direction which is orthogonal to the first direction; a common trunk passage communicating with the liquid passage ports, the common trunk passage extending in the first direction; a plurality of branch passages communicating with the trunk passage, and respectively communicating with the liquid passage ports; and a plurality of branch circuit wiring sections connected to the connectors of the liquid ejecting heads, the branch circuit wiring sections supplying the electric signals to the liquid ejecting heads, wherein the plurality of liquid ejecting heads are mounted such that the liquid passage ports of each partially adjacent liquid ejecting head are not adjacent to each other in the second direction, and such that the connectors of each partially adjacent liquid ejecting head are not adjacent to each other in the second direction.