Abstract: An endoscope system includes: an endoscope including a bending portion that is capable of bending; a drive device that is detachably connected to the endoscope and drives the endoscope; and an operation device that is communicably connected to the drive device and has an input portion that inputs an operation for driving the endoscope, wherein the drive device can select a method of controlling the bending portion with respect to the operation input from the input portion from fine movement control and coarse movement control, and the distance at which the drive device bends the bending portion by the coarse movement control with respect to a predetermined operation input is larger than the distance at which the drive device bends the bending portion by the fine movement control.