The invention has an object to provide a high-quality print. To achieve the object, an inkjet printing device (100) includes: a transferring roller, a print-heater (6) for heating a medium (20); and an after-heater (7) for heating an ink, wherein the device has a plurality of inkjet heads, and the plurality of inkjet heads discharges inks in different colors and are aligned along a direction of transfer of the medium.