A needle-like tubular body (12) with its tip formed as a needle, a first guide wire (14), and a second guide wire (16) are inserted into a main tube (10). A first opening and a second opening (28 and 36) through which a first guide wire and a second guide wire (14 and 16) are respectively extended out of the main tube (10) are provided in the main tube (10). A projection aperture (32) through which the needle of the needle-like tubular body (12) is projected out of the main tube (10) is provided in the main tube (10). A support tube (60) that supports the part of the second guide wire (16) extending from the second opening (36) is further provided in the main tube (10).