A medicament delivery device includes a body having a proximal end and a distal end, in turn comprising a distal housing part, and a medicament container holder, adapted to receive a medicament container； a dose setting drum for setting a dose when rotated in a first direction and for delivering a dose when rotated in a second direction, and a drive drum sleeve selectively operably connectable to a piston plunger for delivering a dose.藥物輸送裝置包含具有近側端與遠側端之本體，依序包括遠側外殼部份、及一被設計成適於承納藥物容器之藥物容器夾具；劑量設定圓筒，用於當在第一方向中旋轉時設定一劑量，且用於當在第二方向中旋轉時輸送一劑量；及驅動器圓筒軸套，選擇性可操作地連接至一柱塞，用於輸送一劑量。
