An electronic endoscope apparatus, comprising a media drive unit for recording image data, which is given digital processing, in a recording medium, judges a recordable amount of images by the detection of a free space of the above-mentioned recording medium, and displays a message, prompting the replacement of the recording medium in a monitor when this recordable amount becomes zero. Then, when the recording medium is replaced during the examination of the same patient, the electronic endoscope apparatus automatically creates a folder for a patient in this recording medium, and records remaining image data in this folder for a patient. In addition, also when the recordable amount becomes zero after the examination end switch was pushed, the electronic endoscope apparatus automatically creates a folder for the patient in a replaced recording medium, and records remaining image data in this folder.