PROBLEM TO BE SOLVED: To provide a light source device that can be safely and easily repaired even when failure occurs.SOLUTION: The light source device includes: a primary light source module 6 that has a primary light source 10 for emitting primary light an optical conversion module 8 that includes an optical conversion unit 30 that changes an optical property of the primary light emitted from the primary light source 10 so as to generate secondary light light guide means 20 that is disposed between the primary light source module 6 and the optical conversion module 8 and guides the primary light emitted from the primary light source 10 from the primary light source module 6 to the optical conversion module 8 a first connection unit 40 that detachably interconnects the optical conversion module 8 and the light guide means 20 and a second connection unit 50 that detachably interconnects the primary light source module 6 and the light guide means 20.SELECTED DRAWING: Figure 2
