An image formation device capable of forming a plurality of reduced images on an output medium comprises an input data acquisition unit which acquires input data, a recognizability judgment unit which judges whether each reduced image to be formed corresponding to each piece of input data acquired by the input data acquisition unit is recognizable to a user or not based on the input data and size of the reduced image to be formed, and a reduced image formation unit which forms the reduced images that are judged to be recognizable by the recognizability judgment unit on the output medium while prohibiting the formation of the reduced images that are judged to be unrecognizable by the recognizability judgment unit.