A 3-D image display including an image forming unit for forming an image by modulating light according to image information is provided. The 3-D image display includes a display device with a plurality of first regions for forming a left eye image and a plurality of second regions for forming a right eye image in a 3-D image mode. The 3-D image display also includes a viewpoint controller with first and second reflection mirror devices for reflecting light of a left eye image and light of a right eye image input from the image forming unit to first and second viewpoints when displaying a 3-D image. The locations of the first and second viewpoints may be changed by controlling an angle of reflection surfaces of the first and second reflection mirror devices.