A drive assembly for use in a drug delivery device is proposed, the drive assembly comprising: a housing having a proximal end and a distal end； an axis extending between the proximal end and the distal end； at least one drive member； a piston rod adapted to be driven along the axis by the drive member； an indicator adapted to provide positional information about a position of the piston rod relative to the proximal end, wherein the indicator and the piston rod are configured to convert a movement of the piston rod with respect to the housing into a rotational movement of the indicator. Additionally, a drug delivery device comprising the drive assembly is provided for.本發明提出一種用於藥物輸送裝置的驅動總成，該驅動總成包括：具有一近端和一遠端的一殼體；在該近端與該遠端之間延伸的一軸線；至少一驅動構件；適於被該驅動構件沿該軸線驅動的一活塞桿；適於提供關於該活塞桿相對於該近端之一位置的位置資訊的一指示器，其中該指示器和該活塞桿經配置用於將該活塞桿相對於該殼體之一移動轉換成該指示器之一旋轉運動。此外，本發明提出一種包括該驅動總成的藥物輸送裝置。
