The invention relates to a drug delivery device (1) comprising: - a case (2) adapted to hold a medicament container (3), - a plunger (10) disposed within the case (2) and slidable from a proximal position into a distal position for delivering a medicament (M) from the medicament container (3), - an audible indicator (12) that is arranged within a case pocket (2.2.2) lateral to the plunger and that is in operative connection with the plunger (10), the audible indicator (12) comprises at least one indicator spring (12.1) and at least one locking element (12.2), wherein the indicator spring (12.1) is biased by the locking element (12.2), and the indicator spring (12.1) relaxes due to a release of the locking element (12.2) by a movement of the plunger (10).
