An introducing device system includes: a bending portion which is provided on a distal end side of an elongated insertion portion； a pulling member that bends the bending portion through a pulling action； a driving unit that generates a driving force for bending driving of the bending portion through rotational driving； an operation input unit including a bending operation device for performing an input operation for pulling the pulling member； a driving force transmitting unit that transmits a driving force of the driving unit from the driving unit to the pulling member in accordance with an input operation of the bending operation device included in the operation input unit； a detection section that detects a speed of the input operation of the bending operation device； and a control unit including a driving unit control section configured to perform control for increasing a rotational speed of the driving unit to increase the driving force to be transmitted to the driving force transmitting unit when the speed of the input operation of the bending operation device obtained by the detection section is higher than an input speed determined in advance.
