In order to minimize a difference between a size of a subject region, which is displayed on a screen by an operator, of when an endoscope with a normal viewing angle is used and a size of the subject region, which is displayed on the screen by the operator, of when an endoscope with a wide viewing angle is used as much as possible, an endoscope system has a first endoscope having a first observation optical system with a first viewing angle and a second endoscope having a second observation optical system with a second viewing angle that is wider than the first viewing angle, wherein a second distance from a second distal end face of an insertion portion of the second endoscope to a minimum focal point of the second observation optical system is shorter than a first distance from a first distal end face of a distal end portion of the first endoscope to a minimum focal point of the first observation optical system.
