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Abstract

Provided are: a light guide element in which the occurrence of multiple images can be suppressed and a wide viewing angle can be obtained; and an image display apparatus including this light guide element. The light guide element includes: a light guide plate; and first A, first B, second A, and second B incidence diffraction elements and first A, first B, second A, and second B emission diffraction elements, in which the first A and second A incidence diffraction elements and the first B and second B incidence diffraction elements diffract incident light in different directions to be incident into the light guide plate, periods of diffraction structures of the first A and first B incidence diffraction elements are different from periods of diffraction structures of the second A and second B incidence diffraction elements, periods of diffraction structures of the first A and first B emission diffraction elements are different from periods of diffraction structures of the second A and second B emission diffraction elements, the emission diffraction elements are disposed at overlapping positions in a main surface of the light guide plate, and periodic directions of the diffraction structures of the first A and first B emission diffraction elements intersect with periodic directions of the diffraction structures of the second A and second B emission diffraction elements.

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