An image pickup apparatus is provided which realizes an improvement in the accuracy of a subject tracking function of the image pickup apparatus during continuous shooting. This image pickup apparatus includes an image pickup unit configured to capture a plurality of auxiliary images during an interval between capturing of a main image and capturing of a next main image; a first subject tracking processing unit configured to detect a region where a subject that is the same as a main subject exists, from a first region that is a part of a first auxiliary image among the plurality of auxiliary images; and a second subject tracking processing unit configured to detect a region where a subject that is the same as the main subject exists, from a second region of a second auxiliary image among the plurality of auxiliary images, the second region being larger than the first region.