1. An image retrieval apparatus comprising: face retrieving means for retrieving image data that contains the face of a person from plural items of image data; display means for displaying the image data that has been retrieved by said face retrieving means; registering means for extracting face data, which is for image retrieval, from the image data displayed by said display means, and registering the face data as reference face data; and image retrieving means for retrieving image data, which contains specified reference face data from among the reference face data registered by said registering means, from the plural items of image data.