An endoscope system includes an endoscope having a position/angle sensor and an amplifying circuit, a memory configured to store output error sensitivity data and a first wiring resistance value, and a processor including a signal processing circuit configured to process an output signal from the amplifying circuit. The signal processing circuit corrects an error of the output signal based on a value obtained by multiplying a difference between the first wiring resistance value and a processor wiring resistance value by the output error sensitivity data.
