A drive assembly (1) for use in a drug delivery device is proposed, the driveassembly comprising: a housing (2)having a proximal end (3) and a distal end (4)； an axis (a) extending betweenthe proximal end and the distal end； at least onedrive member； a piston rod (6) adapted to be driven along the axis by thedrive member, an indicator (5) adapted to provide positionalinformation about a position of the piston rod relative to the proximal end,wherein the indicator and the piston rod are configuredto convert a movement of the piston rod with respect to the housing into arotational movement of the indicator. Additionally,a drug delivery device comprising the drive assembly is provided for.
