1. A moving image display device that sequentially displays frame images, each consisting of multiple pixels, for video display, said moving image display device comprising: an input unit that inputs a moving image of multiple frame images at a preset frame rate; a read-out unit that reads out a first frame image and a subsequent second frame image, which is to be displayed immediately after the first frame image, from the input moving image; a mixing rate specification unit that specifies parameters representing mixing rates of the first frame image and the second frame image for synthesis; a synthesis unit that extracts pixels from the first frame image and from the second frame image in a complementary manner according to the specified parameters and combines the extracted pixels to generate at least one intermediate frame image; and a display unit that displays the generated at least one intermediate frame image after the first frame image and before the second frame image in the process of displaying the moving image.