A moving object imaging device is provided in which an optical axis of a camera is changed by a plurality of movable mirrors having different sizes, and which not only improves image quality but also maintains tracking performance. The invention is directed to a moving object imaging device for tracking and imaging a moving object crossing an approximately horizontal direction, including: a camera configured to capture an image of the moving object sequentially reflected by a plurality of movable mirrors; a mirror movable in a gravity direction configured to define a gravity direction of the captured image of the camera as a scanning direction; a first motor configured to change an angle of the mirror movable in the gravity direction; a mirror movable in a left-and-right direction configured to define a left-and-right direction of the captured image of the camera as a scanning direction; a second motor configured to change an angle of the mirror movable in the left-and-right direction; and a controller configured to control the camera, the first motor, and the second motor, the camera capturing the image of the moving object that is sequentially reflected by the mirror movable in the gravity direction and the mirror movable in the left-and-right direction.