<p>In order to provide an illumination device with a curved light-emitting surface with a high uniformity ratio, a backlight (10) comprises: a plurality of light-guide plate blocks (12) that cause light from LEDs (11) to be surface-emitted from planar light-emitting surfaces (13); and the LEDs (11) disposed on the end surface of each of the plurality of light-guide plate blocks (12). A first light-guide plate block (12) and a second light-guide plate block (12) among the plurality of light-guide plate blocks (12) are adjacent and are configured such that the light-emitting surface (13) of the second light-guide plate block (12) is inclined against the light-emitting surface (13) of the first light-guide plate block (12).</p>
