An electronic endoscope has a video-scope having an image sensor and a video-processor. The video-scope is connected to the video-processor, to which a computer system, having a display unit and a digital recorder, is connected. The image-pixel signals corresponding to an object image, formed on the image sensor, are read from the image sensor and processed to obtain digital video signals. The digital video signals are generated in accordance with a square-pixel frequency, which is a sampling frequency for the computer system. The digital video signals are fed to the computer system to display the object image on the display unit, and/or record the object image in the digital recorder.