To print an image on a medium so as to visually enhance brightness.

An inkjet printer for printing a requested image on a medium by discharging ink onto the medium by an inkjet system comprises: an inkjet head for visible color inks, which discharges a plurality of visible color inks that reflect light in respective wavelength ranges; and an inkjet head for transparent fluorescent ink, which discharges a transparent fluorescent ink which reflects of light with a wavelength range being the same as a wavelength range of at least one of the plurality of visible color inks discharged from the inkjet head for visible color. The printer prints an image by discharging the visible color ink and the transparent fluorescent ink.