There is provided an image processing device that includes a facial image extraction portion, a positivity computation portion, and a selected image update portion. The facial image extraction portion specifies a facial region of an imaged subject within at least one sequentially input selection-eligible image and extracts from the selection-eligible image a facial image that corresponds to the facial region. The positivity computation portion computes for the selection-eligible image, using the corresponding facial image, a positivity of the imaged subject toward a person who acquired the selection-eligible image. The selected image update portion compares the selection-eligible image for which the positivity was computed in the positivity computation portion to a selection candidate image that has the greatest positivity among selection-eligible images for the same imaged subject for which the positivities have already been computed, and makes the image with the greater positivity the new selection candidate image.