An endoscope system (1) includes: an endoscope (2) including an insertion portion (21), an image pickup portion (25) that acquires a plurality of images by time-sequentially picking up optical images of a subject by means of an objective optical system (24) provided in a distal end portion of the insertion portion (21), and a channel (26) that opens at the distal end portion of the insertion portion (21) a laser probe (5) that is inserted through the channel (26) an image analysis portion (33) that detects an image portion showing the laser probe (5) with respect to each image and a control portion (35) that permits laser output only in a case where it is determined that the laser probe (5) protrudes from the opening of the channel (26) based on detection results with respect to the image portion showing the laser probe (5) for a plurality of images that are time-sequentially consecutive.
