A guide wire gripping device is provided that includes: a sheath； an advanceable and retractable part extending along the longitudinal axis of the sheath； an operation control that moves the advanceable and retractable part along the longitudinal axis； a grasping portion having a contact surface having a peripheral edge surrounded by a distal end, a proximal end, and a pair of side ends； and a support part connected to the advanceable and retractable part and fixed to one of the pair of side ends.
