This invention as the balloon of the aforementioned advanced side surface the outside balloon (2) is done the substance tube which provides the balloon for the advanced side surface in the balloon equipped guide tube for the stab which it has (1), the balloon outside particular the substance tube where (2) is located inside (1) in the wall surface, the needle which the stab needle (22) passes forms the hole, closes the said hole in airtightness with the seat material which possesses expansibility and offers the balloon equipped guide tube for the stab which provides the particular seat material as the inside balloon (9). When the outside balloon (2) making expand, the inside balloon (9) the outside balloon (2) by the internal pressure the aforementioned needle from the hole the main lumen (5) to swell on internal side, because the thorn to be packed it is possible the point of the stab needle (22) to particular swelling circles, a deeper stab quantity it is guaranteed, to guarantee safely and securely it is possible the route in order dermally to approach to internal.本発明は、先端側表面にバルーンを備えた本体チューブ(1)を備えた穿刺用バルーン付きガイドチューブにおいて、前記先端側表面のバルーンを外バルーン(2)とすると共に当該外バルーン(2)の内部に位置した本体チューブ(1)の壁面に、穿刺針(22)が通る針挿通穴を形成し、該穴を膨張性を有するシート材によって気密に塞ぎ当該シート材を内バルーン(9)として設けた穿刺用バルーン付きガイドチューブを提供する。外バルーン(2)を膨張させたとき内バルーン(9)が外バルーン(2)の内圧で前記針挿通穴からメインルーメン(5)の内部側に膨出し、穿刺針(22)の先端を当該膨出部内まで刺込むことができるので、より深い穿刺量を確保し、経皮的に体内にアプローチするためのルートを安全、確実に確保することができる。
