PROBLEM TO BE SOLVED: To provide an endoscope system that enables an edge shape of a blade to be obtained with high contrast in an inspection image.SOLUTION: An endoscope system 1 has: a plurality of LEDs 32 an illumination device 12 that is arranged to have the plurality of LEDs 32 aligned so as to be along an edge part EP of one blade B of a plurality of blades B provided in a periphery of a rotating shaft AR of a rotor R of an engine E for illuminating the edge part EP along a radial direction of the rotating shaft AR and a borescope 11 that has an observation window 21a making reflection light of illumination light from the plurality of LEDs 32 incident so as to be capable of imaging one blade Bs and an adjacent blade Bt behind the one blade Bs or in front thereof.
