A guiding elongated medical member includes: a proximal end area 42 having a predetermined length and outer diameter with a substantially circular cross sectional shape a distal end area 41 which is provided so as to extend from a distal end of the proximal end area and has an outer diameter smaller than the proximal end area a first lumen 44 which is arranged in the proximal end area, opened at a near end and a remote end of the distal end area, and also adapted to allow a penetration of at least an operation medical member for carrying out a predetermined medical action and at least one first hole portion 47a (47b) which is in communication with the first lumen and is arranged in a side peripheral portion of the proximal end area.
