An insertion assist information detection system includes an endoscope apparatus and a movement amount detection sensor. The endoscope apparatus includes an insertion portion to be inserted into a tube, a grasp portion which is grasped by an operator, and a movable portion which mechanically connects the insertion portion and the grasp portion to relatively move the insertion portion and the grasp portion. The movement amount detection sensor detects a relative movement amount of the insertion portion and the grasp portion in the movable portion.
