A light source apparatus 1 includes: a light source section 10 that emits a luminous flux whose quantity of light is larger in a central region than in a peripheral region； a condensing optical system 30 that condenses an incoming luminous flux； a light distribution correction optical element 20 arranged between the light source section 10 and the condensing optical section 30, in which a central portion has a negative power that is more intense than that of a peripheral portion； and a connecter section 40 capable of being detachably connected with a light guide 2D that guides the luminous flux condensed by the condensing optical system 30.
