A display device is provided with: a display means that is mounted on a vehicle, that displays a virtual image of a picture by projecting, on a windshield, display light representing the picture, and that emits the display light; an identification means that identifies a target (W) outside the vehicle; a control means that causes a first captured image (Va), visually recognized as being superposed on at least a part of the target (W), to be displayed in the picture; and a vibration detection means that detects the amount of vibration of the vehicle. The control means, when the amount of vibration detected by the vibration detection means exceeds a threshold value, causes a second captured image (Vb) to be displayed instead of the first captured image (Va). The second captured image (Vb) is an image of which a color shade difference between pixels configuring an image end and a region outside the image and adjacent to the image end is decreased compared with the first captured image (Va). In this way, even if a position error is caused between a predetermined object and a captured image displayed while being superposed on the object, a sense of discomfort that a viewer may feel can be decreased.