1. An imaging device, comprising: a display section for displaying a moving image that has been acquired by imaging; a touch panel, provided facing the display section, for detecting a touch position; a face detection section for detecting size and position of faces from within the moving image; a facial organ detection section for detecting the size and position of organs constituting a face that has been detected by the face detection section; and a designated image determination section for determining, from an operation position that has been detected by the touch panel, a size and position of a face that has been detected by the face detection section, and a size and position of organs that have been detected by the facial organ detection section, whether an image selected based on the operation position is at least a face or an organ; wherein the designated image determination section, in the event that the size of a face or organ that has been detected by the facial organ detection section is a size for which focus detection is possible, and further that the size occupied by the face or organ within the display section is smaller than a determination standard based on a size of a finger that operates the touch panel and has been subjected to averaging processing, enlarges a determination region having a first, predetermined size, for determining whether an image corresponds to the face or organ, in accordance with a position that has been subjected to a touch operation on the touch panel.