A lane marking detection apparatus, a lane marking detection method, and a lane marking detection program is provided, which can detect a lane marking precisely even when noise is present. The lane marking detection apparatus is provided with an original image acquiring means which acquires an original image obtained by imaging a road from a traveling object traveling along the road, a lane marking position detection means which detects the relative position of a lane marking included in the road, from the traveling object, based on the original image, and a examination means which examine the result of the detection obtained by the lane marking position detection means, based on a partial image of a first image that is an original image at time t0 and the partial image of a past image that is the original image captured before time t0.