The traffic line creation device which creates the traffic line representing a motion trace of the tracking target comprising: an object detection unit which detects the tracking target from an image frame to create detection result information including a detected area of the tracking target; a state determination unit which determines a state of the tracking target based on the detection result information; a reference point creation unit which creates a reference point of the tracking target by using the detected area with a method corresponding to the state determined at the state determination unit; and a traffic line creation unit which creates the traffic line representing a motion trace of the tracking target by connecting a plurality of the reference points created for a plurality of the image frames.