The present invention relates to a medicament delivery device comprising: a housing (10, 16) having a distal and an proximal end, said housing being adapted to receive a medicament container (18) with a delivery member (20) or with a connectable delivery member for delivery of a medicament； a drive mechanism (54) arranged to act on a plunger rod (58), which plunger rod (58) in turn is arranged to act on the medicament container (18) for providing automatic delivery of the medicament； a release mechanism (62) interactively connected to the drive mechanism (54) for releasing the drive mechanism (54) from a pre-tensioned state； a signal generating mechanism (90) for generating an audible and/or tactile and/or visual signal indicating that the medicament has been completely delivered, which signal generating mechanism (90) is operably connected to said drive mechanism such that it is arranged movable in a longitudinal direction in relation to said drive mechanism (54), that said drive mechanism (54) is arranged with a signal release mechanism (111) capable of activating said signal generating mechanism (90) at a certain longitudinal position of said drive mechanism after its release, for generating an audible and/or tactile and/or visual signal, wherein said signal generating mechanism (90) comprises a signal delay mechanism (105) operably arranged to delay the generation of signal after activation of said signal generating mechanism (90).La présente invention concerne un dispositif d'administration de médicament comprenant : un boîtier (10, 16) ayant une extrémité distale et une extrémité proximale, ledit boîtier étant conçu pour recevoir un récipient de médicament (18) avec un élément d'administration (20) ou avec un élément d'administration pouvant être relié pour l'administration d'un médicament； un mécanisme d'entraînement (54) conçu pour agir sur une tige de piston (58), laquelle tige de piston (58) est conçue, à son tour, pour agir sur le récipient de médicament
