SUBJECT TRACKING DEVICE, SUBJECT TRACKING METHOD, AND STORAGE MEDIUM

In order to provide a subject tracking device capable of reducing erroneous tracking of a subject, the subject tracking device includes an image acquisition unit configured to sequentially acquire images, a tracking unit configured to track a subject which is detected from the images acquired by the image acquisition unit by comparison between images over a plurality of images which are sequentially acquired by the image acquisition unit, and a switching unit configured to switch a time for continuing tracking in the tracking unit in accordance with a type of the subject detected from the images.