An endoscope system comprises: an endoscope which outputs a video signal based on an endoscope image obtained by an image pickup section for picking up an optical image of a subject and a video processor to which the endoscope is detachably connected and which performs video signal processing on the video signal from the endoscope. The video processor comprises a correction amount acquiring section, in a case where the endoscope has a first frequency correction section for performing a frequency correction of the video signal, to which first frequency correction information used in the first frequency correction section is inputted and which acquires second frequency correction information for performing a frequency correction in concert with frequency correction processing by the first frequency correction section based on the first frequency correction information, and a second frequency correction section which performs the frequency correction on the video signal from the endoscopes using the second frequency correction information.
