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 with a delivery member or with a connectable delivery member for delivery of a medicament; a drive mechanism arranged to act on a plunger rod, which plunger rod in turn is arranged to act on the medicament container for providing automatic delivery of the medicament; a release mechanism interactively connected to the drive mechanism for releasing the drive mechanism from a pre-tensioned state; a signal generating mechanism for generating an audible and/or tactile and/or visual signal indicating that the medicament has been completely delivered, which signal generating mechanism is operably connected to said drive mechanism such that it is arranged movable in a longitudinal direction in relation to said drive mechanism, that said drive mechanism is arranged with a signal release mechanism capable of activating said signal generating mechanism 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 comprises: a signal delay mechanism operably arranged to delay the generation of signal after activation of said signal generating mechanism wherein said signal generating mechanism comprises a signal generating element wherein said signal generating element comprises a generally tubular body; said delay mechanism comprises an element operably connected to said signal generating element and arranged to act between said signal generating element and said drive mechanism, characterized in that the element is a friction enhancing element, wherein said generally tubular body of the signal generating element is slidably arranged in a correspondingly shaped passage, and wherein said friction enhancing element is arranged to act between the body and walls of said passage. a housing (10, 16) having a distal and an proximal end, said housing being adapted to receive a medicament container with a delivery member or with a connectable delivery member for delivery of a medicament; a drive mechanism arranged to act on a plunger rod, which plunger rod in turn is arranged to act on the medicament container for providing automatic delivery of the medicament; a release mechanism interactively connected to the drive mechanism for releasing the drive mechanism from a pre-tensioned state; a signal generating mechanism for generating an audible and/or tactile and/or visual signal indicating that the medicament has been completely delivered, which signal generating mechanism is operably connected to said drive mechanism such that it is arranged movable in a longitudinal direction in relation to said drive mechanism, that said drive mechanism is arranged with a signal release mechanism capable of activating said signal generating mechanism 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 comprises: a signal delay mechanism operably arranged to delay the generation of signal after activation of said signal generating mechanism wherein said signal generating mechanism comprises a signal generating element wherein said signal generating element comprises a generally tubular body; said delay mechanism comprises an element operably connected to said signal generating element and arranged to act between said signal generating element and said drive mechanism, characterized in that the element is a friction enhancing element, wherein said generally tubular body of the signal generating element is slidably arranged in a correspondingly shaped passage, and wherein said friction enhancing element is arranged to act between the body and walls of said passage.