A negative monitoring device comprising a CCD camera, and a line sensor is incorporated in a 3-D stereograph printing equipment. Images on a negative are taken in the printing equipment, and then, the coordinates are designated on a TV monitor. Thus, the spatial parallax of each projected negative image is measured. When the variation of the parallax by the photographing location is small, the exposure pattern is so determined to form an image band having a band width and a band pattern which makes the photograph stereoscopic by combining the negatives having a large distance between the positions. The displacement of a key subject on the main object of each negative is measured. The exposure position is corrected in accordance with the result of the measurement. When the displacement of the key subject on the main object is greater than the threshold value, it is judged that the main object is in the foreground. A correction is made to suppress the parallax of the object in the background view, thus executing the positioning and exposure. On the contrary, when the displacement of the key subject on the main object is smaller than the threshold value, it is judged that the main object is in the distant view. A correction is made to suppress the parallax of the object in the foreground, thus executing the positioning and exposure. If no main object can be specified in a landscape photograph or the like, an arbitrary position is selected as a key point for the measurement of the displacement, thus a correction is made. In consideration of the difference in parallax between the objects in the foreground and background, a 3-D stereograph printing equipment can print stereographs having desirable spatial parallax, stereoscopic sense and picture quality.