An image display apparatus (10, 32) that receives light rays from an object A on one side thereof and forms an image on the other side thereof as an image B, the image display apparatus (10, 32) comprising: first light-reflective mirrors (13, 35) and second light-reflective mirrors (14, 36) formed orthogonal to one another and continuously in a right-triangle-wave pattern in cross section; third light-reflective mirrors (15, 38) orthogonal to each of corresponding ones of the first and second light-reflective mirrors (13, 35, 14, 36) and arranged vertically; and fourth light-reflective mirrors (16, 46) each located next to corresponding ones of the first and second light-reflective mirrors (13, 35, 14, 36) and arranged horizontally, wherein the image B becomes formed either 1) by light rays from the object A each reflecting off one each of the first to third light-reflective mirrors (13, 35, 14, 36, 15, 38), which form retroreflective bodies, and then turning in a different direction on a corresponding one of the fourth light-reflective mirrors (16, 46) or 2) by light rays from the object A each turning in a different direction on a corresponding one of the fourth light-reflective mirrors (16, 46) and then being reflected by a corresponding one each of the first to third light-reflective mirrors (13, 35, 14, 36, 15, 38), which form retroreflective bodies, the first and second light-reflective mirrors (13, 35, 14, 36) are formed in the triangle-wave pattern at lower portions of first transparent bodies (11, 33), which are rectangular in plan view, second transparent bodies (12, 34) are provided adjacent to the first transparent bodies (11, 33), the fourth light-reflective mirrors (16, 46) each are formed in an intermediate position or at a ceiling position of each of the second transparent bodies (12, 34), which are rectangular in plan view, the third light-reflective mirrors (15, 38) are provided on side surfaces of the first transparent bodies (11,33), the first transparent bodies (11, 33) each are arranged facing backwards to another one of the first transparent bodies (11, 33), each pair of the first transparent bodies (11, 33) having one of the third reflective mirrors (15, 38) in the middle so as to form one of composite blocks, and the second transparent bodies (12, 34) are arranged between each of the composite blocks arranged spaced from one another. first light-reflective mirrors (13, 35) and second light-reflective mirrors (14, 36) formed orthogonal to one another and continuously in a right-triangle-wave pattern in cross section; third light-reflective mirrors (15, 38) orthogonal to each of corresponding ones of the first and second light-reflective mirrors (13, 35, 14, 36) and arranged vertically; and fourth light-reflective mirrors (16, 46) each located next to corresponding ones of the first and second light-reflective mirrors (13, 35, 14, 36) and arranged horizontally, wherein the image B becomes formed either 1) by light rays from the object A each reflecting off one each of the first to third light-reflective mirrors (13, 35, 14, 36, 15, 38), which form retroreflective bodies, and then turning in a different direction on a corresponding one of the fourth light-reflective mirrors (16, 46) or 2) by light rays from the object A each turning in a different direction on a corresponding one of the fourth light-reflective mirrors (16, 46) and then being reflected by a corresponding one each of the first to third light-reflective mirrors (13, 35, 14, 36, 15, 38), which form retroreflective bodies, the first and second light-reflective mirrors (13, 35, 14, 36) are formed in the triangle-wave pattern at lower portions of first transparent bodies (11, 33), which are rectangular in plan view, second transparent bodies (12, 34) are provided adjacent to the first transparent bodies (11, 33), the fourth light-reflective mirrors (16, 46) each are formed in an intermediate position or at a ceiling position of each of the second transparent bodies (12, 34), which are rectangular in plan view, the third light-reflective mirrors (15, 38) are provided on side surfaces of the first transparent bodies (11,33), the first transparent bodies (11, 33) each are arranged facing backwards to another one of the first transparent bodies (11, 33), each pair of the first transparent bodies (11, 33) having one of the third reflective mirrors (15, 38) in the middle so as to form one of composite blocks, and the second transparent bodies (12, 34) are arranged between each of the composite blocks arranged spaced from one another.