A parking assist system includes an image obtaining means for obtaining an image of a view from a vehicle, a displaying means for displaying the image obtained by the image obtaining means in a monitor display provided in the vehicle, an inputting means for inputting a target parking position, at which the vehicle is parked, on the monitor display, a detecting means for detecting a relative relationship between the vehicle and the target parking position, and a judging means for judging whether or not the vehicle can be parked at the target parking position based upon the relative relationship detected by the detecting means.