the present invention is a needle-less syringe of the replacement of that device to the switch using a syringe and drug intake In order to allow the inlet and administration of drug is also easily replaced without having to filter the needle when the needle for drug administration and administration, and the tubular body having a through hole in the longitudinal direction, a small overhang at the front of the tube than the diameter of the tube the syringe body is formed and the mounting portion extends in the interior of the tubular body is provided with a piston, the needle pin consists of a needle hub configured to switch the device between the front of the injector consisting of a needle and the needle pin which is provided on the tube of the syringe body but , the switching apparatus And to be communicated to the tube body and the needle pin, providing a fixture which forms the upper opening of the receiving portion is formed having a circular cross section, said receiving portion and rotatably inserted in the fixture and is for administration in one direction, and the through passage formed administered and a switching section that is formed for the through-passage is sucked toward the upper side or the lower portion of the passageway for the administration to be offset for the passage, is formed in the switch portion is constituted by the upper side handle only once to be formed in the outer rotatable jidoe ever, for the administration for the passage and the intake passage is located in a horizontal line on the switching unit all of the respective inlet and outlet side, which is the center of the passage for the suction side to be formed so as to pass through the lower side of the passage for the administration center side is collected in the space formed and provide a full-time, made hayeoseo provide a filter which is fixed suction passage provided in the rotor.본 발명은 니들의 교체가 필요 없는 주사기의 전환장치에 관한 것으로 주사기를 이용한 약물흡입 및 약물투여시 필터니들과 투여용니들을 교체하지 않고서도 용이하게 약물의 흡입 및 투
