The present invention relates to a metered dropletmedicament delivery device for delivering metered doses of medicament, comprising a proximal and a distal part having opposite distal and proximal ends； a medicament container arranged with a movable stopper； a dose delivery mechanism comprising a plunger rod, operably arranged to act on said stopper； wherein said proximal part and said distal part are releasably connectable to each other, whereby said proximal part comprises a medicament container holder accommodating said medicament container and distal part comprises said dose delivery mechanism with said plunger rod, wherein a plunger rod positioning member engageable with a proximal end of said plunger rod as well as engageable with a proximal area of said distal part for positioning said plunger rod in a longitudinal direction of the device in relation to said proximal area (218, 222).本發明有關用於輸送經計量的藥物劑量之經計量的微滴藥物輸送裝置，包括近側零件及遠側零件，其具有相反的遠側及近側端部；藥物容器，被配置有可運動的塞子；劑量輸送機件，包括柱塞桿，可操作地配置來作用在該塞子上；其中該近側零件及該遠側零件係可釋放地連接至彼此，藉此該近側零件包括容納該藥物容器之藥物容器夾具，且該遠側零件包括具有該柱塞桿的劑量輸送機件，其中柱塞桿定位構件可與該柱塞桿之近側端部嚙合、以及可與該遠側零件的近側區域(218、222)嚙合，用以關於該近側區域將該柱塞桿定位在該裝置之縱向方向中。
