This scanning endoscope system is provided with an endoscope that scans a subject using illumination light supplied from a light source unit, the scanning endoscope system including: a first optical connector which is provided outside the endoscope and in which an output end of a first optical fiber that guides the illumination light supplied from the light source unit is disposed； a second optical connector which is provided in the endoscope, is connected to the first optical connector, and has disposed thereon an input end of a second optical fiber that guides the illumination light emitted through the output end of the first optical fiber； and a light source control unit that performs an operation for correcting output intensity of the illumination light supplied from the light source unit on the basis of a first parameter that indicates the amount of deviation of a placement position of the output end of the first optical fiber in the first optical connector and a second parameter that indicates an amount of deviation of a placement position of the input end of the second optical fiber in the second optical connector.走査型内視鏡システムは、光源部から供給される照明光を用いて被写体を走査する内視鏡を具備し、内視鏡の外部に設けられ、光源部から供給される照明光を導く第１の光ファイバの出射端部が配置された第１の光コネクタと、内視鏡に設けられ、第１の光コネクタに接続されるとともに、第１の光ファイバの出射端部を経て出射される照明光を導く第２の光ファイバの入射端部が配置された第２の光コネクタと、第１の光コネクタにおける第１の光ファイバの出射端部の配置位置のずれ量を示す第１のパラメータと、第２の光コネクタにおける第２の光ファイバの入射端部の配置位置のずれ量を示す第２のパラメータと、に基づき、光源部から供給される照明光の出力強度を補正するための動作を行う光源制御部と、を有する。
