Introducing device system

An introducing device system comprising:

• an insertion portion configured to be inserted into a subject;
• a bending portion which is provided at the insertion portion and configured to be bendable;
• an operation portion through which an input operation is performed for bending the bending portion;
• a pulling member connected to the bending portion and pulled in accordance with the input operation through the operation portion;
• a detection section configured to detect a moving state of the pulling member that moves in accordance with the input operation;
• a driving unit that rotationally drives;
• a driving force transmitting unit including an inner circumferential surface configured to be able to contact an outer circumferential surface of the driving unit, and an outer circumference on which the pulling member is wound, the driving force transmitting unit being reduced in diameter in accordance with pulling of the pulling member;
• and
• a driving unit control section configured to perform control for increasing a rotational speed of the driving unit when the moving state detected by the detection section is different from a state determined in advance.