Provided is a dialog supporting device which can support dialog to be speedily completed on the whole, by reducing the number of operations required to generate one utterance regardless of dialog partner's interrupting utterances. The dialog supporting device includes: an example database which holds examples used in the dialog; an utterance receiving unit which receives an utterance of the user and provides the utterance as utterance information; an example selecting unit which (i) extracts candidates for an example by searching the example database based on the utterance information, (ii) selects a desired example from the extracted candidates according to instructions from the user, and (iii) obtains a translated example associated with the selected example; a sending unit which sends the translated example to a dialog supporting device of a dialog partner of the user; a receiving unit operable to receive an example from the dialog supporting device of the dialog partner; an utterance outputting unit which outputs the received example; and an example reevaluating unit which reevaluates the candidates held in the example selecting unit, based on the received example.