To easily perform the high-level operation of a navigation device by displaying plural candidates for a word to be recognized, which are recognized and selected by a speech processing part, in a different display style by the section of the word to be recognized.

An inputted speech is recognized under the control of a speech recognizing circuit 14. Data on the recognized candidates are read out of a memory for a candidate list in the speech recognizing circuit 14 and supplied to the navigation device 20. A video signal generating circuit 28 generates a video signal of the candidate list and the video signal is supplied to a display device 40 to display the candidate, list. The candidate list is displayed in the decreasing order of matching degrees from the 1st candidate to about the 5th candidate. At this time, the candidates for the place name and the candidates for the command are displayed in different styles. For example, the display colors of characters are made different. Or, the font is made different and the candidates are displayed.