The wireless endoscope is an image capturing unit that captures an image of an object, a power storage component that holds electric power, and an electric power required for endoscopic observation that is detachably attached to an endoscope main body that includes the image capturing unit and the power storage component. A detection unit for detecting a connection state of the battery generating the battery to the endoscope main body, and when a detection result of the battery non-connection state is given from the detection unit, electric power from the power storage component is supplied to the endoscope A controller that is used as power necessary for observation and sets an operation mode at the time of replacement in which the endoscope observation is performed with low power compared to a normal operation mode in which the endoscope observation is performed with power from the battery. It has. ワイヤレス内視鏡は、被写体を撮像する撮像部と、電力を保持する蓄電部品と、前記撮像部及び蓄電部品を内蔵する内視鏡本体に着脱自在に取り付けられて内視鏡観察に必要な電力を発生するバッテリの前記内視鏡本体への接続状態を検出する検出部と、前記検出部から前記バッテリの未接続状態の検出結果が与えられると、前記蓄電部品からの電力を前記内視鏡観察に必要な電力として用いると共に、前記バッテリからの電力によって前記内視鏡観察を行う通常時動作モードに比べて低い電力で前記内視鏡観察を行う交換時動作モードを設定する制御部とを具備する。
