1. A tracking device which tracks a tracking object by controlling a photographing section so as to continuously include the tracking object in a photographic image, the tracking device comprising: feature information detection means for detecting feature information from the photographic image; tracking object matching means for (i) comparing the feature information thus detected with tracking object information in which feature information of a plurality of figures are registered so that the feature information corresponds to a priority indicating tracking order of the feature information, and (ii) determining whether or not the feature information thus detected is information of the tracking object; priority acquisition means for acquiring the priority of the feature information thus detected from the tracking object information, in the case where it is determined that the feature information thus detected is the information of the tracking object; and control means for controlling the photographing section, based on the priority thus acquired, so as to continuously include, in the photographic image from which the feature information is detected, feature information that has a highest priority in the photographic image.