Illumination device and illumination function input apparatus including the

To provide a uniform illumination capable illumination device the required illumination unit with a small number of light sources. And A light-emitting diodes 5, 6, an elongated plate-like light guiding plates 3 and 4 to be distributed to the side surface other than the light incident surface of the outgoing light of the light emitting diodes 5,6, a plurality of through holes 21 are opened, the elongate in illumination function input device including an illumination device comprising a planar light guide plate 2 which for light radiation from the through hole 21 propagates to the plane direction of the incident light from the plate-like light guiding plates 3 and 4, the planar light guide plate the 2, unformed elongate plate-shaped light guide plate set grooves 22 and 23 formed in the portion, side surfaces and an elongated plate-shaped light guide plates 3 and 4 of the elongated plate-shaped light guide plate set grooves 22 and 23 of the through-holes 21 preparative are opposed to, sets an elongated plate-shaped light guide plates 3 and 4 in an elongated plate-shaped light guide plate set groove 22, 23. .FIELD 1