A display device of the present invention includes a light source 111, a
light guide 113 having a light-receiving surface 113a for receiving light
from the light source 111 and a light-exiting surface 113c for emitting
the light, which has entered the light guide 113 through the
light-receiving surface 113a, a reflection type display element 120
provided on one side of the light guide 113 that is closer to the
light-exiting surface 113c, and a refractive-index-adjusted layer 131
provided between the light guide 113 and the reflection type display
element 120 and having a different refractive index from that of the light
guide 113. The light guide 113 and the reflection type display element 120
are attached to each other via the refractive-index-adjusted layer 131,
and at least one of the interface between the light guide 113 and the
refractive-index-adjusted layer 131 and the interface between the
refractive-index-adjusted layer 131 and the reflection type display
element 120 is subjected to an anti-interface-reflection treatment for
suppressing the reflection of light at the interface.
