The present invention provides an endoscope system that enables an operator to obtain an excellent view of an image of an object being examined irrespective of the way in which the endoscope is held. The endoscope system of the present invention includes: an endoscope that has an image pickup device that picks up an observation image of a test object an image display unit that converts image pickup signals that have been sent from the image pickup device into images and then displays these images a first mounting portion that is provided in an operating section of the endoscope and on which the image display unit is mounted and a second mounting portion that is provided in the operating section of the endoscope and on which the image display unit is mounted in a different position from that of the first mounting portion.
