Directivity of light beams can be adjusted appropriately relative to the normal to the light emission surface of a light source. Thus, the light source apparatus has high brightness without significant unevenness in illumination with its simple structure. The light source apparatus comprises a light source substrate on which plural light sources are arranged, a secondary light source member on which a secondary light source surface is formed when it receives light from the plural light sources, and frame that supports the light source substrate and the secondary light source member from their lateral sides so that they are opposed to each other. At least a pair of side surfaces of the frame has reflection surfaces opposed along the arrangement direction of the plural light sources, and the reflection surfaces that the pair of side surfaces has are inclined to the same direction relative to the light source substrate.