To realize a structure enabling high density arrangement of a plurality of ink supply holes and to surely prevent mixture of colors when ink of different colors are supplied to the ink supply holes, respectively.
A head unit 11 of an inkjet head comprises a plurality of nozzles for ejecting ink to a recording medium and the plurality of ink supply holes 33 which are respectively formed on ends of fluid passages respectively communicating with the nozzles for supplying the ink. A joint member 50 connected to the head unit by an adhesive has a plurality of cylinder sections 51 having fluid passages 53 each communicating with the respective plurality of ink supply holes 33 and a single collar section 52 having the plurality of cylinder sections 51 formed thereon and being connected to the head unit. A recessed section 55 to which an adhesive can be put in is formed on the collar section 52 at the bonding face to the head unit across the fluid passages 53 on the cylinder section 51.
Makoto Suhara
Katsunori Muto
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