The next separate element, namely, the container (1) and the exit passage (14) with, pump sending unit (5) is included being the medical application liquid injection device which, as for the above-mentioned container (1), the above-mentioned pump sending unit (5) being made to adhere on fixed, it is, non- you question it has the characteristic wall which, description above non- you question the characteristic wall which, furthermore, the above-mentioned pump sending unit (5) and the above-mentioned container (1) forms the direct fluid connected section between in first stage the passage which includes (4), the above-mentioned exit passage (14), the above-mentioned container (1) inside is kept the fluid which first description abovePump sending unit (5) passing by in, flowing, in order that next above-mentioned exit passage (14) to reach, we are connected by the above-mentioned pump sending unit (5) directly, and, as for this medical application liquid injection device, furthermore, the above-mentioned exit passage (14) with the entrance which is separate (16) with, the medical application liquid injection device which has with the disposable element.次の別個の要素、すなわち、容器(1)と、出口流路(14)と、ポンプ送りユニット(5)とを含む医療用液体注射装置であって、上記容器(1)は、上記ポンプ送りユニット(5)が上に固定的に固着させられている不とう性の壁を備え、上記不とう性の壁は、さらに、上記ポンプ送りユニット(5)と上記容器(1)との間の直接的な流体連結部を形成する通路(4)を含み、上記出口流路(14)は、上記容器(1)内に初期に保持された流体が最初に上記ポンプ送りユニット(5)の中を通って流れてその次に上記出口流路(14)に達するように、上記ポンプ送りユニット(5)に直接的に連結されており、および、この医療用液体注射装置は、さらに、上記出口流路(14)とは別個である入口(16)と、使い捨ての要素とを備える医療用液体注射装置。