A light-guiding component includes a light introduction section, the light introduction section including a first light incidence portion and a second light incidence portion that face different directions. The first light incidence portion is capable of receiving incident light from a light source that corresponds to the first light incidence portion, and the second light incidence portion is capable of receiving incident light from a light source that corresponds to the second light incidence portion. A light-guiding section provided with a light exit surface and configured to guide the light from the first light incidence portion or the second light incidence portion to be propagated therein and then exit from the light exit surface.