An endoscope system of the present invention comprises: an endoscope which acquires a front field-of-view image and a lateral field-of-view image of an object of observation; a detecting section which obtains a predetermined detection result based on a predetermined output signal or a predetermined output information; and an image processing section which generates an observation image including the front field-of-view image and the lateral field-of-view image within the same screen, displays a magnified image of one field-of-view image out of the front field-of-view image and the lateral field-of-view image on a display section based on the predetermined detection result, and performs processing of changing a display appearance of the other field-of-view image out of the front field-of-view image and the lateral field-of-view image on the display section.
