For each image data, face information indicating the number of faces of subjects included in an image is added. Further, the percentage of images in which there exist faces is calculated. When the percentage exceeds a face detecting flag threshold, the face detecting flag is set ON. When the percentage does not exceed the face detecting flag threshold, the face detecting flag is set OFF. The face detecting flag is stored in the flash memory portion of the memory. The face detecting flag is read from the flash memory portion of the memory in the shooting mode at the next time. When the face detecting flag is set ON, an image display device displays instructions on prompting a user to make the face detecting function effective.