The present invention relates to a reminder device for a drug delivery device (10), comprising: a base member (12, 14), - an adjusting element (22； 36) movably disposed with respect to the base member (12, 14) between at least two stop positions, and a display means (18； 28) comprising an information surface (26； 40) being only partially discernible through an aperture (30； 38), wherein at least two designated segments (25, 27) of the information surface (26； 40) become selectively discernible by a displacement of the adjusting element (22； 26) relative to the base member (12, 14).
