Abstract: A combined sentence generating device 20 that generates combined sentences of images and characters includes: a sentence reading module 21 that reads natural language sentences; a conversion object specifying module 22 that specifies a conversion object portion out of the natural language sentences; and an object to image converting module 23. The object to image converting module 23 specifies a converted image corresponding to the conversion object portion in reference to an image database 30 storing images in association with words expressing contents of the respective images, converts the conversion object portion of the natural language sentences to the converted image to generate the combined sentences, and makes the combined sentences displayed. A part of the natural language sentences are thus converted to the image.