An endoscope system (1) includes: an insertion portion (21); an illumination portion (23) that emits a plurality of illuminating lights of different hues to each other; an image pickup portion (25) that picks up an optical image formed by an objective optical system (24) in a distal end portion of the insertion portion (21); a channel (26) that opens in a distal end portion of the insertion portion (21); a laser probe (5) that is inserted through the channel (26) and has an irradiation portion (51) in a distal end region; a hue range setting portion (36) that sets a hue range of the laser probe (5) in accordance with a hue of an illuminating light; an image analysis portion (33) that detects a hue range portion in a color image obtained from the image pickup portion (25); and a control portion (35) that permits laser output only in a case where the hue range portion is detected.