A calibration apparatus for an onboard camera includes an image acquiring unit, a marker recognizing unit, a movement distance calculating unit, an image storage unit, and a calibration unit. The movement distance calculating unit calculates a movement distance of a vehicle based on a number of times that a process in which a first feature portion in a marker moves to a position overlapping a second feature position in the marker in the image is repeated. The image storage unit stores a specific image that includes the marker. The calibration unit calibrates the onboard camera using the specific image. The image storage unit stores, as the specific image, (a) the image in which the marker is recognized, and (b) the image acquired when the movement distance from a position of the vehicle when the specific image has been acquired in the past reaches a predetermined distance.