The present invention relates to a drive member of a drug delivery device for dispensing of a dose of a medicament, the mechanism comprising: a housing (30) extending in an axial direction (1, 2), a piston rod (90) to operably engage with a piston (16) of a cartridge (14) to displace the piston (16) in an axial distal direction (1), a dose indicating mechanism (130) comprising a first spool (140 240) and a second spool (142 242) rotatably supported in the housing (30), wherein first and second spools (140, 142 240, 242) are oriented substantially parallel to each other and substantially parallel to the piston rod (90), a dose indicating tape (146 246) coiled onto at least the second spool (142 242) and fixed with an end to an outer circumference of the first spool (140 240).
