A kind of device (20) being used for a guide line (12) is provided. Described device includes: a guiding tube (22), has a guide line bonding part (122) And a slit (28), it is extendd proximally from a distal end (32) of the conduit along a wall of the guiding tube, a proximal end (29) for the slit is located at the distal side of a proximal end (30) for the conduit. One first support (52), around the conduit, and it can be advanced to together in an inner cavity of an object with the conduit, the first support slideably promotes and leaves the distal end of the conduit, an and second support (54), in the nearside of the first support, and surround a portions of proximal of the conduit, and the distal end of the conduit can be promoted and left to enter the inner cavity, and be placed with the first support side by side behind the distal end that the propulsion first support leaves the conduit. Also the other applications of description in text.
