A lighting apparatus and projection display apparatus using the same are disclosed. The present invention includes a plurality of light sources emitting lights, respectively, each transmitting at least one of a light emitted from a different light source and a light having transmitted through the different light source and a light guiding unit sending the lights emitted from the light sources and the light transmitted through the light sources in one direction. Accordingly, the lighting apparatus can minimize the etendue to provide sufficient intensity of light despite a plurality of the light sources. By eliminating the necessity for the color separating/synthesizing unit using the lighting apparatus or by eliminating the necessity for the integrator using the lighting apparatus having the long reflecting member, the projection display system can be implemented with a simple configuration.