PROBLEM TO BE SOLVED: To provide an operation part for an intra-hole introduction device in which, even if a user performs work to push a pressing part while gripping a gripper, a need for firmly gripping the gripper is reduced, it is hard to apply a load to the gripped hand and is hard to make a user get tired, and to provide the intra-hole introduction device.SOLUTION: An operation part for an intra-hole introduction device includes: a cylindrical gripper with an insertion part connected thereto, having first to four surfaces, and defined in the longitudinal axis and a switching part with a pressing unit having a pressing part provided in the third surface among the outside of the gripper, and biased to a pressing release position and having a pressing direction axis defined in a state of an acute angle in the circumferential direction around the longitudinal axis of the cylindrical gripper to a first normal of the first surface.
