A light source apparatus, comprises a lamp housing, a xenon lamp provided in the lamp housing, a reflection mirror which reflects light emitted from the xenon lamp, and first and second power feeders which supply electric power to the xenon lamp, wherein a direction of the first power feeder connected to one end of the xenon lamp and a direction of the second power feeder connected to the other end thereof are approximately in point symmetry with respect to a center of lamp axis connecting electrodes which face each other.