To provide an electronic endoscope apparatus capable of retaining a high reliability even under an environment of a strong magnetic field.

An electronic endoscope includes an MRAM for storing endoscope intrinsic information data, and a magnetic sensor for detecting the size of magnetism received by the MRAM. When the magnetic sensor detects magnetism of a prescribed threshold or higher, data of at least part of items of the endoscope intrinsic information data are evacuated into a memory of an electronic endoscope processor as evacuation data. When the magnetism detected by the magnetic sensor becomes smaller than the prescribed threshold, the data evacuated into the memory of the electronic endoscope processor are restored to the MRAM as the endoscope intrinsic information data.