Abstract: This paper puts forward a method of generating epipolar images using the elements of exterior orientation on aerial stereo image pairs.Firstly,the strict geometry relation between the epipolar images and original stereo images is proposed;and then the feasibility and accuracy of the geometry relation is proved by the experiments using the actual aerial images at the 1∶3 000 scale.The empirical results indicate that the epipolar images generated using the elements of exterior orientation obtained by bundle block adjustment and calibrated POS data can get the familiar quality compared with the method using elements of relative orientation and the vertical parallax of corresponding image points is within one pixel,which satisfies the demand for stereoscopic observation in photogrammetry,but the ones generated using the POS data uncalibrated has about 70 pixels vertical parallax,which can not be used for stereoscopic observation.