Provided are a ink-jet printer and a medium transfer method printer may include a placement section configured to attract a rolled medium, and to move in a direction parallel to a medium transferring direction, an ink discharging unit configured to move in a direction perpendicular to the medium transferring direction, an unwinding section configured to unwind the medium onto the placement section, and a winding section configured to wind the medium from the placement section. In addition, the ink discharging unit may be configured to discharge ink on the medium at the same time that the placement section moves in the direction of the medium transferring direction and while the placement section attracts the medium. Furthermore, the ink discharging unit also may be configured to discharge ink on the medium at the same time that the unwinding section unwinds the medium and the winding section winds the medium.