This invention is something regarding the interposition device in order to interpose the medical device into the hypodermic of the patient. As for this invention, being the interposition device, two guide means which the hypodermic part which makes the interposition vessel part and the cannula or the sensor where it can provide - containment means (52) and conversion means (51) and, the fixed housing (30) which has the guide means (32) which restrict the movement of the operational component (38) and the - operational component (38) which the punched component (50) which it has and the guide means (39) which restrict the movement of - conversion means (51a and 51b) have and, it possesses, the operational component (38), are separated mutually completely(It has 39a and 39b), each of those guide means (39a and 39b), engages at least the complete interposition time of portion of the hypodermic part of the punched component (50) in at least the portion of that kind of complete interposition, vis-a-vis the individual part of conversion means (51a and 51b).本発明は、医療デバイスを患者の皮下内に挿入するための挿入デバイスに関するものである。本発明は、挿入デバイスであって、-保持手段(52)と変換手段(51)とが設けられた挿入器部分と、カニューレまたはセンサとされた皮下部分と、を備えた穿孔部材(50)と、-変換手段(51a、51b)の移動を制限する案内手段(39)を備えた可動部材(38)と、-可動部材(38)の移動を制限する案内手段(32)を備えた固定ハウジング(30)と、を具備し、可動部材(38)が、互いに完全に分離された2つの案内手段(39a,39b)を備え、それら案内手段(39a,39b)の各々が、穿孔部材(50)の皮下部分の少なくとも一部の完全な挿入時には、そのような完全な挿入の少なくとも一部において、変換手段(51a,51b)の個別部分に対して係合する。