1. An object detecting device for detecting objects in front of a vehicle, on the basis of images of two cameras, the object detecting device comprising: a disparity acquisition unit which compares individual images of the two cameras and calculates a disparity for each pixel; a near-far boundary setting unit which sets a boundary between a near region close to the vehicle and a far region distant from the vehicle, in a single image of one of the two cameras; a near object detecting unit which detects an object of the near region, on the basis of the disparity; and a far object detecting unit which detects an object of the far region, on the basis of the single image.