PROBLEM TO BE SOLVED: To provide a small light source device capable of switching the color of emitted light.SOLUTION: A light source device 10 includes a first semiconductor laser 22A, a second semiconductor laser 22B, and a phosphor unit 62. The first semiconductor unit 22A emits blue light with a wavelength of 460 nm, and the second semiconductor laser 22B emits blue purple light with a wavelength of 415 nm. The phosphor unit 62 absorbs the blue light emitted by the first semiconductor laser 22A and emits light with a wavelength of about 530 nm, but transmits most of the blue purple light emitted by the second semiconductor laser 22B.
