PROBLEM TO BE SOLVED: To provide an endoscope system that properly controls the amount of illumination light over a wide dynamic range according to the type of an imaging element mounted on an endoscope.SOLUTION: The endoscope system includes an endoscope 11 that comprises a lighting optical system for irradiating a subject with light from a light source 43a, and an imaging optical system including the imaging element 11b for imaging the subject, and a control device to which the endoscope 11 is detachably connected. The endoscope system also includes a light source control section that controls outgoing beam intensity of the light source 43a depending on a light quantity instruction value input from the control device 13, and a type identifying means for identifying the type of the imaging element 11b mounted on the endoscope 11 connected to the control device. The light source control section is equipped with multiple kinds of control patterns indicating a relationship between the light quantity instruction value and a control output value for the light source 43a, sets any one of the control patterns on the basis of the result of identification performed by the type identifying means, and controls the outgoing beam intensity of the light source 43a on the basis of the set control pattern.【課題】内視鏡に搭載された撮像素子の種別に応じて、照明光の光量を広いダイナミックレンジで適切に制御することが可能な内視鏡システムを提供する。【解決手段】光源４３ａからの光を被検体に照射する照明光学系、及び被検体を撮像する撮像素子１１ｂを含む撮像光学系を有する内視鏡１１と、内視鏡１１が着脱自在に接続される制御装置とを備える内視鏡システムであって、光源４３ａの出射光強度を、制御装置１３から入力される光量指示値に応じて制御する光源制御部と、制御装置に接続された内視鏡１１に搭載の撮像素子１１ｂの種別を識別する種別識別手段と、を有する。光源制御部は、光量指示値と光源４３ａへの制御出力値との関係を表す制御パターンを複数種備え、種別識別手段による識別結果に基づいていずれかの制御パターンに切り替え、切り替えた制御パターンに基づいて光源４３ａの出射光強度を制御する。【選択図】図１
