A three-dimensional image display device, comprising: an image display panel configured to display a 3D image; a control unit configured to control a viewpoint image, that is formed by pixels of the image display panel for each viewpoint to be provided to a viewer and generating a viewing zone according to brightness distribution of the 3D image at a viewing distance; and a viewer position tracking system configured to determine a position of a viewer's pupil and transmit positional information to the control unit, wherein the image display panel provides multiple viewpoints of at least four viewpoints, and the image display panel displays the 3D image using a parallax barrier serving as a parallax separation means, characterized in that N-1 viewpoint centers are spaced by a certain distance between binocular viewpoints, whereby the distance between binocular viewpoints corresponds to the distance between left and right pupil and N is an integer of 2 to 65 determined at an optimal viewing distance such that a space between neighboring viewpoints is 65mm/N, an aperture width of the parallax barrier is 1.6 to (2N-1) times a pixel width (Wp), thereby crosstalk is minimized by providing the viewpoint images corresponding to both of the viewer's eyes at viewpoints corresponding to viewing-zone centers closest to the centers of both of the viewer's eyes, and by removing the viewpoint image other than those of the selected viewpoints using 3D information about positions of the viewer's pupils, the 3D information being obtained through the real-time tracking of the viewer position tracking system, and an intersection point between a viewing zone of any one of the multiple viewpoints and a viewing zone of an adjacent viewpoint has 85% or more of a maximum brightness of one of the viewpoints. an image display panel configured to display a 3D image; a control unit configured to control a viewpoint image, that is formed by pixels of the image display panel for each viewpoint to be provided to a viewer and generating a viewing zone according to brightness distribution of the 3D image at a viewing distance; and a viewer position tracking system configured to determine a position of a viewer's pupil and transmit positional information to the control unit, wherein the image display panel provides multiple viewpoints of at least four viewpoints, and the image display panel displays the 3D image using a parallax barrier serving as a parallax separation means, characterized in that N-1 viewpoint centers are spaced by a certain distance between binocular viewpoints, whereby the distance between binocular viewpoints corresponds to the distance between left and right pupil and N is an integer of 2 to 65 determined at an optimal viewing distance such that a space between neighboring viewpoints is 65mm/N, an aperture width of the parallax barrier is 1.6 to (2N-1) times a pixel width (Wp), thereby crosstalk is minimized by providing the viewpoint images corresponding to both of the viewer's eyes at viewpoints corresponding to viewing-zone centers closest to the centers of both of the viewer's eyes, and by removing the viewpoint image other than those of the selected viewpoints using 3D information about positions of the viewer's pupils, the 3D information being obtained through the real-time tracking of the viewer position tracking system, and an intersection point between a viewing zone of any one of the multiple viewpoints and a viewing zone of an adjacent viewpoint has 85% or more of a maximum brightness of one of the viewpoints.