A stereoscopic image display device comprising: a display displaying side by side a plurality of small images (11, 11a), each of the small images containing three-dimensional display data, to convert the three-dimensional display data into rays and output the rays from each of the small images; a first mechanical shutter panel disposed so as to abut on the display or being integrated with the display, the first mechanical shutter panel having first mechanical shutters (14, 14a) composed of a plurality of first MEMS shutters, each of the first MEMS shutters having a same size as each of pixels of the display, the first MEMS shutters being arranged in accord with disposition of the pixels of the display; and a second mechanical shutter panel disposed in front of the first mechanical shutter panel, the second mechanical shutter panel having second mechanical shutters (16, 16a) composed of a plurality of second MEMS shutters, each of the second MEMS shutters having the same size as each of the pixels of the display, the second MEMS shutters being arranged in accord with the disposition of the pixels of the display, the first mechanical shutters being disposed in front of the display so as to correspond respectively to positions of a plurality of partial regions (13, 13a) provided in each of the small images displayed on the display, the first mechanical shutters being configured to extract the rays in a time-division manner as partial rays each output from the plurality of partial regions and transmit the partial rays forward; and the second mechanical shutters being disposed in front of the first mechanical shutters so as to correspond respectively to the positions of the small images displayed on the display and configured to transmit forward the partial rays extracted in a time-division manner per each of the small images reconstruct the partial rays as the rays, and converge each of the reconstructed rays in front to form a three-dimensional image. a display displaying side by side a plurality of small images (11, 11a), each of the small images containing three-dimensional display data, to convert the three-dimensional display data into rays and output the rays from each of the small images; a first mechanical shutter panel disposed so as to abut on the display or being integrated with the display, the first mechanical shutter panel having first mechanical shutters (14, 14a) composed of a plurality of first MEMS shutters, each of the first MEMS shutters having a same size as each of pixels of the display, the first MEMS shutters being arranged in accord with disposition of the pixels of the display; and a second mechanical shutter panel disposed in front of the first mechanical shutter panel, the second mechanical shutter panel having second mechanical shutters (16, 16a) composed of a plurality of second MEMS shutters, each of the second MEMS shutters having the same size as each of the pixels of the display, the second MEMS shutters being arranged in accord with the disposition of the pixels of the display, the first mechanical shutters being disposed in front of the display so as to correspond respectively to positions of a plurality of partial regions (13, 13a) provided in each of the small images displayed on the display, the first mechanical shutters being configured to extract the rays in a time-division manner as partial rays each output from the plurality of partial regions and transmit the partial rays forward; and the second mechanical shutters being disposed in front of the first mechanical shutters so as to correspond respectively to the positions of the small images displayed on the display and configured to transmit forward the partial rays extracted in a time-division manner per each of the small images reconstruct the partial rays as the rays, and converge each of the reconstructed rays in front to form a three-dimensional image.