The invention relates to a drug delivery device (1) for dispensing a liquid drug through a needle (7) with a proximal and a distal needle tip(7.1, 7.2), comprising - a body (2, 12), - a needle holder (5, 15) holding the needle (7) relative to the body (2, 12), - a cartridge holder (3, 13) holding a cartridge (4) comprising the liquid drug sealed with a septum (4.1) on a distal end and with a movable stopper (4.2) on a proximal end, and - a cap (8, 18) adapted to cover at least the distal needle tip (7.2) of the needle (7), wherein the cartridge holder (3, 13) is movable relative to the body (2, 12) from a retracted position towards an advanced position, thereby piercing the proximal needle tip (7.1) through the septum (4.1), characterized in that the cap (8, 18) is releasably engaged with the cartridge holder (3, 13), wherein the cap (8, 18) is released from the cartridge holder (3, 13) in its advanced position.本發明涉及一種藥物輸送裝置(1)，其用於通過針(7)分配液體藥物，針(7)具有近側針尖端(7.1)和遠側針尖端(7.2)，該藥物輸送裝置包括：-主體(2，12)，-相對於主體(2，12)保持針(7)的針保持器(5，15)，-保持藥筒(4)的藥筒保持器(3，13)，藥筒(4)包含液體藥物，在遠端用隔膜(4.1)密封，在近端用可移動的阻塞件(4.2)密封，和-帽(8，18)，其適於至少覆蓋針(7)的遠側針尖端(7.2)，其中，藥筒保持器(3，13)相對於主體(2，12)可從退回位置朝向前方位置移動，由此使近側針尖端(7.1)刺穿隔膜(4.1)，其特徵在於：帽(8，18)與藥筒保持器(3，13)可釋放地接合，其中，在藥筒保持器(3，13)的前方位置，帽(8，18)從藥筒保持器(3，13)釋放。
