An endoscope system of the present invention includes an illumination unit (3) for emitting illumination light (L1) toward a subject (S), an imaging unit (4) for imaging a subject (S), and an elongated An illumination device (1) comprising an insertion portion (1) and an illumination device (2) disposed in a channel (9), wherein the illumination device (2) has a divergence angle smaller than the illumination light (L1) An illuminating part (10) for emitting illumination light (L2) having sensitivity with a sensitivity toward a subject (S), a pulling member (10) extending from the proximal end of the illuminating part (10) to the outside of the channel (11), and the illumination section (10) can be removed from the channel (9) by pulling the towing member (11).本発明の内視鏡システムは、被写体(S)に向かって照明光(L1)を射出する照明部(3)、被写体(S)を撮像する撮像部(4)およびチャネル(9)を有する細長い挿入部(1)と、チャネル(9)内に配置された照明装置(2)とを備え、該照明装置(2)が、照明光(L1)よりも小さな発散角を有し、かつ、撮像部(4)が感度を有する照明光(L2)を被写体(S)に向かって射出する照明部(10)と、該照明部(10)の基端からチャネル(9)の外部へ延びる牽引部材(11)とを有し、照明部(10)は、牽引部材(11)の牽引によってチャネル(9)内から抜去可能である。
