An image display device is provided to minimize light loss due to refractive index in a boundary surface between a protective window and an image unit by controlling the refractive index by a filling member. An image module(210) provides a user with the image information. A protective window(221) is positioned in an upper part of the image module. A filling member(230) is injected between the protective window and the image module for coupling the protective module and the image module.
