Recently, the market of inkjet printers has accomplished dramatic growth by means of high-speed and high-quality imaging technologies.GelSprinter Aficio GX series are the latest type of inkjet printers to create business documents on plain papers in high-speed and high-quality as well as duplex printing, which had been considered as very difficult to be achieved.Which have overcome the above difficulties are the newly developed Inkjet technologies;(1) Pigment ink with high viscosity and penetration improves image quality on plain papers. (To be described in another paper.)(2) Newly developed print-head of 1.27 inch width enables high-speed printing and supports two-bit control with Modulated Dot Technology.We developed wide Print-head with high stiffness and control method of drive in order to eject new pigment ink droplet stably. In this paper, we show the structure of wide Print-head with high stiffness and describe the control method of drive.