Endoscopes comprise image pickup elements for picking up images and transmission
circuits and the like for transmitting the picked up images with radio waves of
different frequencies. In addition, bar codes to code the frequencies used for
transmission are provided to the respective endoscopes, the bar code provided to
the endoscope used in endoscope inspection is read on a receiver side, and a reception
frequency of a station selection unit is set to the read frequency, so that a signal
obtained by a desired endoscope can be easily received and imaged even in case
a plurality of endoscopes are used.
