In an image display device in which two light guides are combined, flat plates (16, 17) of the same material as that of a substrate (11) of a first light guide (10) is affixed to the outsides of a first surface (11a) and a second surface (11b) of the substrate (11), the first surface (11a) and the second surface (11b) opposing each other. Image light introduced into the substrate (11) is reflected by an incident-side reflective surface (12) toward exit-side reflective surface (13a to 13f), which are half mirrors, and a part of the image light is reflected in stages by the respective exit-side reflective surfaces (13a and 13f) and the remainder of the image light is transmitted. The image light reflected by the exit-side reflective surfaces (13a to 13f) is emitted through the second flat plate (17) and introduced into a second light guide. The part of the image light reflected by the incident-side reflective surface (12) reaches the interface between the first surface (11a) and the first flat plate (16), but enters the flat plate (16) without being reflected, and hits and is absorbed by a light-absorbing sheet (18). This reduces the occurrence of stray light and improves the visibility of a virtual image displayed before user's eyes.