In the image processing apparatus, the theme determiner determines a theme of the image group based on the image analysis information, and the preference analyzer analyzes a preference of the user based on the theme of the image group. The composite image generator uses a certain number of images corresponding to the preference of the user selected, respectively, from among the plurality of images to generate composite images of a plurality of patterns. The display controller performs control such that one composite image is displayed on the image monitor and, the one composite image displayed on the image monitor is replaced with one composite image designated by the instruction from among the composite images of the plurality of patterns to display the one composite image designated on the image monitor.