PROBLEM TO BE SOLVED: To provide an endoscope system capable of optimally adjusting the power supply capacity of a wireless power supply according to the reception state of the wireless power supply or the battery condition.SOLUTION: The endoscope system 1 comprises: an operation unit 22 including a wireless unit 26 and a control unit 25 and a power supply device 4 including a wireless unit 33, a power supply transmission coil 11, and a wireless power supply control unit 35. The control unit 25 comprises: a reception power detection unit for detecting a reception power value and a remaining battery level detection unit for detecting a remaining battery level value. The wireless unit 26 transmits the detected reception power value and remaining battery level value to the wireless power supply control unit 35 by way of the wireless unit 33. The wireless power supply control unit 35 changes the capacity of the transmission power from the power supply transmission coil 11 on the basis of the reception power value and remaining battery level value, and determines whether or not the power is to be transmitted, on the basis of the remaining battery level value.SELECTED DRAWING: Figure 2
