An endoscope system having a two-stage depression button provided in an operation portion of an endoscope; a first switch changing from off to on by a first stage depressing operation of the depression button and maintaining the on state after the first stage; a second switch changing from off to on by a second stage depressing operation of the depression button; and a control unit controlling to provide an air feeding function when the first switch is on and provide a water feeding function without providing the air feeding function regardless of a state of the first switch when the second switch is on, the control unit controlling to provide the air feeding function with a delay of a predetermined time period so long as the first switch does not change from on to off within the predetermined time period when the first switch changes from off to on.