The present invention relates to a stereo image measuring apparatus for displaying stereo images and effecting three-dimensional measurement and a correlation process on a screen for displaying the stereo images, and particularly to a stereo image measuring apparatus for making it possible to easily take hold of measuring points and to effect a correlation process after feature points have been extracted in the vicinity of the position where each cursor exists. Corresponding points for other image, which correspond to measuring points for one image, are searched. Each of display units serves so as to apply marks on the determined corresponding points based on the measured points and the result of the correlation process.