PROBLEM TO BE SOLVED: To provide a light source device for an endoscope having a safe transmitted illumination with further simple configuration.SOLUTION: A light source device 35 for an endoscope 10 having a main light source 28 and a secondary light source 32, includes: an instruction receiving part 29 for receiving an instruction for lighting a transmitted illumination for notifying a position of a tip of the endoscope to outside of a body and a switching control part 31 for switching the light source to the secondary light source when the instruction receiving part receives the instruction.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】より簡単な構成で、かつ安全な透過照明を備える内視鏡用の光源装置を提供する。【解決手段】主光源28と、副光源32とを備える内視鏡10の光源装置35において、内視鏡先端の位置を体外に知らせる透過照明を点灯する指示を受け付ける指示受付部29と、指示受付部が指示を受け付けた場合、光源を副光源に切り替える切替制御部31とを備える。【選択図】図1
