This display device is provided with a display unit for displaying an image, and a control unit for displaying an image in a prescribed region of the display unit and changing the prescribed region onthe basis of information pertaining to the image. The control unit of the display device expands the size of a first area (100a) toward the right side of a screen, and shrinks the size of a second area (100b) and a third area (100c) in the lateral direction in response to the movement of a main subject (200) toward the right side of the screen, thereby ensuring space for the first area (100a).