1. A stereoscopic-image display apparatus for reading and displaying image files of a pair of left and right stereoscopic images, said apparatus comprising: input means for defining a file name including a portion where a part of a character string regularly changes and a portion where a character string does not change, for each of several image files corresponding to a plurality of images having a parallax between left and right eyes, and for inputting the character string to the portion where the character string does not change; addition means for adding the character string of the regularly changing portion to the character string input by said input means; image determination means for making images whose file names, for each of which the character string has been added by said addition means, to be images corresponding to the left and right eyes; and display means for displaying said images.