Although generating electronic hologram requires huge amount of computation, we succeeded in real-time generation of moving images by a parallel computer with 64 processor elements. The quality of the image, however, was poor because the computer performance limited the number of point sources. In this paper, we aim at high speed generation of higher quality images by a parallel computer with 128 processor elements. We succeeded in generating a hologram more than twice as fast as 64 processor elements by dividing the hologram among the processor elements so that each of them can be loaded equally.