Two types of illumination modes for fluorescence observation are realized with a small configuration. First and second solid-state light sources (11, 12) respectively emitting first and second lights, and a third light source which emits third light which combines with the first and second lights to generate white light An optical member (21, 22) for combining the first, second and third lights and an optical member (21, 22) for inserting and extracting light in the optical paths of the combined light of the first, second and third lights An optical filter (4) capable of being provided, and a control section (5), wherein in the first excitation light illumination mode, the control section (5) controls the first and second solid state light sources ), The third solid-state light source (13) is lighted weakly, in the second excitation light illumination mode, the first solid-state light source (11) is turned on and the second solid-state light source (12) is turned off , And the third solid-state light source (13) is lighted weakly.小型な構成で蛍光観察用の2種類の照明モードを実現する。第1および第2の光をそれぞれ発する第1および第2の固体光源(11,12)と、第1および第2の光と合波することで白色光を生成する第3の光を発する第3の固体光源(13)と、第1、第2および第3の光を合波する光学部材(21,22)と、第1、第2および第3の光の合波光の光路に挿脱可能に設けられた光学フィルタ(4)と、制御部(5)とを備え、該制御部(5)が、第1の励起光照明モードにおいて、第1および第2の固体光源(11,12)を点灯させ、第3の固体光源(13)を弱く点灯させ、第2の励起光照明モードにおいて、第1の固体光源(11)を点灯させ、第2の固体光源(12)を消灯させ、第3の固体光源(13)を弱く点灯させる内視鏡用光源装置(1)を提供する。
