1. A composite image output apparatus comprising: a picked-up image acquiring unit which acquires a picked-up scene image containing a plurality of objects; a target image extracting unit which extracts a target image representing one arbitrary object from the picked-up scene image acquired by the picked-up image acquiring unit; a character image obtaining unit which obtains a character image having a pose corresponding to the target image extracted by the target image extracting unit; and an image outputting unit which outputs a composite image in which the obtained character image having the pose corresponding to the extracted target image is placed at a position determined based on a position of the extracted target image in the picked-up scene image acquired by the picked-up image acquiring unit so as to replace the extracted target image with the obtained character image having the corresponding pose; wherein the target image extracting unit comprises: a distance measuring unit which measures a distance to each of the objects; and a unit which extracts respective images of the objects based on the distances measured by the distance measuring unit; and wherein the image outputting unit superposes the character image and the extracted image of another object in decreasing order of the distances measured by the distance measuring unit.