A parking assist system for a driver to confirm a relationship between relative
positions to obstacles and one's own vehicle. A top plane creating image 7B
in which a circumstance situation of one's own vehicle is indicated from a point
of upward view is created based on a backward image of one's own vehicle taken
by a CCD camera and displayed on a screen of a display. A mobile locus including
a marker G of one's own vehicle, a marker, a parking path, and a current position
is displayed on the top plane creating image in a duplicate way.