1. A solid image taking apparatus comprising: a plurality of image taking units which obtain a plurality of images at each sight point by taking a plurality of images of objects from different sight points; a distance measuring unit which measures object distances which are distances to the objects from the plurality of image taking units; a classifying unit which classifies the objects included in the images into a plurality of groups according to the object distances and outputs the result of classification; a display unit which displays a solid image made from the plurality of images; and a display form changing unit which changes the display form of the object included in the solid image according to the result of classification; wherein the display form changing unit comprises a unit for substituting an image in a corresponding area included in one of the plurality of images for the area at a predetermined object distance included in the solid image.