The present invention relates to a medicament injection device (100) arranged to receive a replaceable container subassembly (103) The medicament injection device (100) comprises a front housing (102) and a rear housing (101) releasably connectable to each other. A reloadable drive mechanism (108) is accommodated in the rear housing (101) for acting on the plunger (14) of a replaceable container subassembly (103) for expelling medicament. A needle hider front is slidably arranged within the front housing. A needle shield remover is arranged to connect with a needle shield of the replaceable container subassembly, wherein the needle shield remover is arranged to be removably inserted into a proximal end of the front housing through the needle hider front. The needle shield remover is adapted to be used to interact with the reloadable drive mechanism accommodated in the rear housing such that a user can reload the drive mechanism.本發明有關被配置來承納一可替換的容器次組件(103)之藥物注射裝置(100)。該藥物注射裝置(100)包括可釋放地連接至彼此的前面外殼(102)及後面外殼(101)。可重新裝載的驅動機件(108)被容納在該後面外殼(101)中,用於作用在該可替換的容器次組件(103)之柱塞(14)上,用於排出藥物。針隱藏件前部係可滑動地配置在該前面外殼內。針屏蔽件拔取器被配置成與該可替換的容器次組件之針屏蔽件連接,其中該針屏蔽件拔取器被配置成經過該針隱藏件前部可移去地插入該前面外殼的近側端。該針屏蔽件拔取器係設計成適於被使用來與該後面外殼中所容納之可重新裝載的驅動機件互相作用,使得使用者可重新裝載該驅動機件。11‧‧‧針屏蔽件13‧‧‧柱塞桿14‧‧‧柱塞15‧‧‧藥物容器16‧‧‧針隱藏件前部101‧‧‧後面外殼102‧‧‧前面外殼103‧‧‧容器次組件109‧‧‧針屏蔽件拔取器
