A printing device for forming a printed image on a medium based on image data, the printing device comprising: a printing head including a nozzle array in which a plurality of nozzles configured to eject a droplet onto the medium are aligned; a control unit configured to control a main scan in which the printing head is moved along a main scan direction intersecting with an alignment direction of the plurality of nozzles, a sub-scan in which at least one of the medium or the printing head is moved along a feeding direction intersecting with the main scan direction, and the ejection of the droplet from the printing head; and a detection unit including a sensor configured to detect a density of a location on the medium at which the droplet ejected from the nozzle array during the main scan lands while moving along the main scan direction together with the print head, the detection unit being configured to detect a landing position in the main scan direction of the droplet ejected from the nozzle array based on a detection result of the sensor, wherein the control unit is configured to control a plurality of the main scans involving the ejection of the droplet and the sub-scan between the plurality of main scans, based on the image data, the plurality of main scans includes a first main scan and a second main scan subsequent to the first main scan, and characterized in that the control unit is configured to control, based on the landing position in the main scan direction detected by the detection unit in the first main scan, a timing at which the printing head is caused to eject the droplet in the second main scan to reduce a deviation in the landing position in the main scan direction of the droplet ejected from the nozzle array between the first main scan and the second main scan. a printing head including a nozzle array in which a plurality of nozzles configured to eject a droplet onto the medium are aligned; a control unit configured to control a main scan in which the printing head is moved along a main scan direction intersecting with an alignment direction of the plurality of nozzles, a sub-scan in which at least one of the medium or the printing head is moved along a feeding direction intersecting with the main scan direction, and the ejection of the droplet from the printing head; and a main scan in which the printing head is moved along a main scan direction intersecting with an alignment direction of the plurality of nozzles, a sub-scan in which at least one of the medium or the printing head is moved along a feeding direction intersecting with the main scan direction, and the ejection of the droplet from the printing head; and a detection unit including a sensor configured to detect a density of a location on the medium at which the droplet ejected from the nozzle array during the main scan lands while moving along the main scan direction together with the print head, the detection unit being configured to detect a landing position in the main scan direction of the droplet ejected from the nozzle array based on a detection result of the sensor, wherein the control unit is configured to control a plurality of the main scans involving the ejection of the droplet and the sub-scan between the plurality of main scans, based on the image data, the plurality of main scans includes a first main scan and a second main scan subsequent to the first main scan, and characterized in that the control unit is configured to control, based on the landing position in the main scan direction detected by the detection unit in the first main scan, a timing at which the printing head is caused to eject the droplet in the second main scan to reduce a deviation in the landing position in the main scan direction of the droplet ejected from the nozzle array between the first main scan and the second main scan.