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 taken by the photographing section, the tracking device comprising: feature information detection means for detecting feature information from the photographic image wherein the feature information is face information which specifies features of the face of a person; tracking object matching means for (i) comparing the feature information thus detected with a tracking object information database, in which feature information of a plurality of persons is 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 a 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 a 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; wherein the tracking object matching means (i) finds a similarity between the feature information detected by the feature information detection means and the feature information included in the tracking object information database, (ii) determines, in a case where the similarity thus found is greater than a predetermined authentication threshold value, that the feature information thus detected is information of a tracking object and (iii) finds authentication reliability indicative of how large the similarity thus found is as compared with the predetermined authentication threshold value; and in a case where the photographic image includes a plurality of feature information having an identical priority, the control means controls the photographing section so that one of the plurality of feature information, which has a greater authentication reliability, is continuously included in the photographic image. feature information detection means for detecting feature information from the photographic image wherein the feature information is face information which specifies features of the face of a person; tracking object matching means for (i) comparing the feature information thus detected with a tracking object information database, in which feature information of a plurality of persons is 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 a 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 a 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; wherein the tracking object matching means (i) finds a similarity between the feature information detected by the feature information detection means and the feature information included in the tracking object information database, (ii) determines, in a case where the similarity thus found is greater than a predetermined authentication threshold value, that the feature information thus detected is information of a tracking object and (iii) finds authentication reliability indicative of how large the similarity thus found is as compared with the predetermined authentication threshold value; and in a case where the photographic image includes a plurality of feature information having an identical priority, the control means controls the photographing section so that one of the plurality of feature information, which has a greater authentication reliability, is continuously included in the photographic image.