The present invention is for attaching overlap so that smearing a smoothed the UV ink on the surface of the print medium condition by improving the print quality and, providing an inkjet printer that can be selected to enhance the printing speed than the print quality depending on the printing object, supported by the support table 12 towards the print medium 2 is irradiated with ultraviolet rays, by the UVLED unit, the UVLED unit for curing the UV ink adhesion to the print medium (2) attached to the print medium 2 UV inks adhered the light quantity of ultraviolet light for irradiating the UV ink, and the controller 23 for adjusting to the light amount of curing from a light quantity for temporarily curing the UV inks, the print medium 2 by the UVLED unit and the controller (23) after the temporarily cured Further included is a second curing step of curing mode and the control unit 20 by which the UV ink at a time of ultraviolet irradiation can switch the one-stage curing mode in which the curing. An inkjet printer, the ultraviolet ray irradiation