To provide a projector capable of radiating high-luminance light in spite of using a light emitting diode.

A white LED 30 is arranged in a light guiding path 50c so that its light emitting point 30a may be arranged nearer to the side of a light emitting aperture 50b than a light incident aperture 50a. The white LED 30 is arranged so that a distance t1 between the light incident aperture 50a and the light emitting point 30a shown in Figure may be t1>0. Thus, the illuminating light of the white LED 30 emitted not only to the front but also to the side is not diffused before it is made incident on a rod integrator 50, so that the illuminating light of the white LED 30 is efficiently condensed.