1. A stereoscopic picture generating apparatus comprising: a storage unit to get stored with a first image containing a plurality of partial images and a second image containing a plurality of partial images corresponding respectively to the plurality of partial images contained in the first image; and an arithmetic unit to extract a first position defined as an existing position of a first partial image contained in the first image and a second position defined as an existing position of a second partial image contained in the first image, to calculate a first differential quantity defined as a difference between the first position and the second position, to calculate a third position defined as a new existing position of a third partial image contained in the second image that corresponds to the first partial image on the basis of the first differential quantity, and to generate a third image on the basis of the third position of the third partial image.