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).
