This application provides an electronic endoscope system allowing an accurate
delay time corresponding to a length of an electronic scope to be set and allowing
a configuration to be simplified. The electronic endoscope system is configured
by connecting electronic endoscopes different in length to a processor unit and
provided with a reference-delay-time generation circuit for generating a signal
having a rough reference delay time and a short-delay-time generation circuit for
generating a signal having a delay time shorter than the reference delay time by
using a gate delay device or the like. A microcomputer in the processor unit reads
delay-time-designation control data D1 and D2 from a ROM
in an electronic scope, generates a delay drive clock signal by the two delay-time
generation circuits in accordance with the control data D1 and D2,
and executes preferable image processing in accordance with the delay signal.
