With long-cherished desire, the medical application injection device which possesses the portable possible needle installation aspect vis-a-vis the computer and the computer is offered, the needle installation aspect has the element in order to install the needle. In initial state, as for the needle installation aspect it is laid out in the computer, as for the needle there is no installation and others re there. By the relative movement between the computer and the needle installation aspect, the needle installation aspect is pushed out from the computer. As a profitable aspect, preparation of the device, the medical application injection device where the proper sequence is guaranteed in regard to the step which after the compound of the medicine which especially is prescribed it tries to be able install the medical application needle in the device, is offered.本願では、本体と、本体に対して移動可能な針取付面を有する医療用注入装置が提供され、針取付面は針を取り付けるための要素を有する。初期状態では、針取付面は本体の中に配置され、そこに針は取り付けられない。本体と針取付面の間の相対的移動により、針取付面が本体から押し出される。有利な面として、装置の準備、特に投与する薬剤の調合の後に装置に医療用針を取り付けることができるようにするステップに関して、適正なシーケンスが確保される医療用注入装置が提供される。