Light guiding apparatus

LED elements (5) which are light emitting elements are mounted on a substrate (7). LED light guide plates (9, 9) which are light-emitting-element light guide components are arranged at positions corresponding to the LED elements (5) of the substrate (7). Each LED light guide plate (9) has a substrate-side protrusion (27) which is a portion to-be-held. The substrate-side protrusion (27) has a sectional shape which becomes smaller toward the substrate (7). The substrate-side protrusions (27) are fitted into the holding holes (37, 39) of a keeper plate (11) which is a holding member. The shapes of the holding holes (37, 39) are different in accordance with the arrangements of the LED light guide plates (9) in a light guide direction. Thus, in spite of the same shape of the LED light guide plates (9), the mounting heights thereof can be made different depending upon places. It is accordingly possible to provide a light emitting apparatus which can decrease the sorts of components.