1. A moving object detection apparatus that detects moving objects by means of plural video images, including image acquisition objects, taken by plural synchronized cameras, comprising; a distance information generating means that generates distance information regarding distance to said image F acquisition objects on a basis of parallax of said cameras, a motion information generating means that generates motion information regarding motion of said moving objects on a basis of differences between video images input in time-series by one of said cameras, an object distance determining means that determines object distance which specifies a location where said moving object locates, an object distance image generating means that generates a object distance image composed with pixels which correspond to said object distance determined by said object distance determining means, an object image area determining means that determines an object image area, included in said object distance image, corresponding to at least said object distance, and a contour detecting means that detects said moving object by detecting contour in said object image area determined by said object image area determining means, wherein said object image area determining means determines a histogram by counting said pixels in vertical direction for every point in a horizontal coordinate thereof, makes a smoothed histogram by smoothing said histogram in said horizontal coordinate and determines an object image area by using said smoothed histogram thereafter.