A parallax image display device comprising: an image acquiring unit that acquires a left-eye image and a right-eye image which can be stereoscopically viewed by generating a parallax image; a parallax image display unit that has a parallax image display area including a left-eye region for displaying the left-eye image and a right-eye region for displaying the right-eye image; and a parallax image generating unit that generates the parallax image, wherein the parallax image display area is composed of unit region sets, each having a rectangular left-eye unit region constituting the left-eye region and a right-eye unit region 18UR) which is same in shape as the left-eye unit region and which constitutes the right-eye region, wherein the parallax image generating unit generates the parallax image by displaying the left-eye image in the left-eye region and displaying the right-eye image in the right-eye region, wherein the parallax image generating unit includes a parallax image display area dividing section, a unit region rearranging section, and an image reflecting section, wherein the parallax image display area dividing section has a stripe dividing function which divides the parallax image display area into stripes, further divides each stripe in a stripe width direction into a left-eye stripe region and a right-eye stripe region having a same width, the left-eye stripe region and the right-eye stripe region being defined as a stripe region set, and arranges the left-eye stripe regions and the right-eye stripe regions so as to be alternately placed in the stripe width direction, and a unit region dividing function which divides the stripe region set into random widths in a stripe direction to generate the unit region sets having different sizes in the stripe direction, wherein the unit region rearranging section alternately rearranges the unit region sets each composed of the left-eye unit region and the right-eye unit region so that the left-eye unit region and the right-eye unit region are alternately arranged in the stripe direction, and wherein the image reflecting section generates the parallax image by reflecting the left-eye image in the left-eye region of the parallax image display area and reflecting the right-eye image in the right-eye region of the parallax image display area, the parallax image display further comprising a polarizing filter that is disposed in front of the parallax image display unit and that can be operated on the basis of the parallax image so that a polarization state of the left-eye region and a polarization state of the right-eye region are different from each other. an image acquiring unit that acquires a left-eye image and a right-eye image which can be stereoscopically viewed by generating a parallax image; a parallax image display unit that has a parallax image display area including a left-eye region for displaying the left-eye image and a right-eye region for displaying the right-eye image; and a parallax image generating unit that generates the parallax image, wherein the parallax image display area is composed of unit region sets, each having a rectangular left-eye unit region constituting the left-eye region and a right-eye unit region 18UR) which is same in shape as the left-eye unit region and which constitutes the right-eye region, wherein the parallax image generating unit generates the parallax image by displaying the left-eye image in the left-eye region and displaying the right-eye image in the right-eye region, wherein the parallax image generating unit includes a parallax image display area dividing section, a unit region rearranging section, and an image reflecting section, wherein the parallax image display area dividing section has a stripe dividing function which divides the parallax image display area into stripes, further divides each stripe in a stripe width direction into a left-eye stripe region and a right-eye stripe region having a same width, the left-eye stripe region and the right-eye stripe region being defined as a stripe region set, and arranges the left-eye stripe regions and the right-eye stripe regions so as to be alternately placed in the stripe width direction, and a unit region dividing function which divides the stripe region set into random widths in a stripe direction to generate the unit region sets having different sizes in the stripe direction, wherein the unit region rearranging section alternately rearranges the unit region sets each composed of the left-eye unit region and the right-eye unit region so that the left-eye unit region and the right-eye unit region are alternately arranged in the stripe direction, and wherein the image reflecting section generates the parallax image by reflecting the left-eye image in the left-eye region of the parallax image display area and reflecting the right-eye image in the right-eye region of the parallax image display area, the parallax image display further comprising a polarizing filter that is disposed in front of the parallax image display unit and that can be operated on the basis of the parallax image so that a polarization state of the left-eye region and a polarization state of the right-eye region are different from each other.