A light source structure of a projector includes at least a solid state lighting element, at least an optical collimator lens, a condenser lens, and a light dispersing apparatus. The solid state lighting element generates a plurality of radial beams, which are incident, to the optical collimator lens. The optical collimator lens converts the radial beams into a plurality of parallel beams which strike the condenser lens. The parallel beams are concentrated and focused by the condenser lens into a projecting beam. The light dispersing apparatus is positioned on at a focal point of the condenser lens and receives the projecting beam to scatter the projecting beam uniformly.