Problem to be solved: to provide an endoscope system having a structure in which the insertion portion can be safely removed from the body cavity even if the operation portion is dropped.Solution: the endoscope 1 and the endoscope 1 are connected to control the operation of the endoscope 1, and an acceleration sensor 20 provided in the operation part 12 of the endoscope 1 for detecting the acceleration to be applied to the operation part 12, and the acceleration sensor 20 is provided in the control device 50, and the acceleration sensor 20 is in the predetermined direction A control circuit 61 for outputting a control signal in the case where the acceleration is more than or equal to the predetermined value is provided in the endoscope 1 or the control device 50, and the switching of the state of the insertion part 2 of the endoscope 1 by receiving a control signal is performedA reformer 25 is provided.Diagram【課題】操作部を落下させてしまったとしても安全に体腔内から挿入部を抜去できる構成を有する内視鏡システムを提供する。【解決手段】内視鏡1と、内視鏡1が接続され、内視鏡1を動作制御する制御装置50と、内視鏡1の操作部12内に設けられ、該操作部12に加わる加速度を検出する加速度センサ20と、制御装置50に設けられ、加速度センサ20が所定方向における一定以上の加速度を検出した場合、制御信号を出力する制御回路61と、内視鏡1または制御装置50に設けられ、制御信号を受信することにより内視鏡1の挿入部2の状態を切り換える切り換え部25と、を具備する。【選択図】図1