1. A three-dimensional image display apparatus comprising: a display panel which displays a parallel projection image formed from a plurality of patterns corresponding to a three-dimensional image to be displayed; and an array plate disposed on a front of the display panel and having a plurality of pinholes arranged two-dimensionally to form the three-dimensional image on a front or a rear of the array plate, wherein the display panel includes a number of pixels arranged two-dimensionally in correspondence with the pinholes, wherein each of the pixels comprises a first subpixel, a second subpixel and a third subpixel, and wherein a first intersection point, a second intersection point and a third intersection point are formed at the three-dimensional image and are separated from one another, the first intersection point being formed where a first line that passes through one of the pinholes from the first subpixel intersects the three-dimensional image, the second intersection point being formed where a second line that passes through the one of the pinholes from the second subpixel intersects the three-dimensional image, and the third intersection point being formed where a third line that passes through the one of the pinholes from the third subpixel intersects the three-dimensional image.