Medicament delivery device comprising, - a housing (10, 114) having a proximal and a distal end, - a delivery member connected to the housing; - a medicament container operably arranged within the housing; - a drive mechanism (102, 108) capable of acting on the medicament container for priming and for expelling a dose of medicament; wherein the device further comprises - an activator mechanism comprising: - a contactor operably arranged to the housing (10, 114) at a proximal end thereof, wherein the contactor is axially movable in relation to the housing between an extended position in which the delivery member is hidden and protected by the contactor and a retracted position in which the delivery member is exposed; - a rotator operably arranged inside the housing (10, 114) and operably connected to the contactor and to the drive mechanism (102, 108); and - a safety member operably arranged to the housing (10, 114) at a distal end thereof and operably connected to the rotator; wherein the activator mechanism is configured to interact with the drive mechanism, such that a first interaction between the activator mechanism and the drive mechanism causes the container to move towards the delivery member wherein the container is primed and such that a subsequent second interaction between the activator mechanism and the drive mechanism causes a dose of medicament to be expelled through the delivery member, wherein the contactor and the rotator are arranged to interact with each other such that the rotator prevents the contactor from being moved from the extended position to the retracted position, until the first interaction is completed, wherein the first interaction is an interaction between the rotator and the drive mechanism caused by an interaction between the safety member and the rotator, whereby removal of the safety member causes a rotation of the rotator such that the drive mechanism may act on the container for priming the container, wherein the second interaction is a further interaction between the contactor and the rotator causing a further interaction between the rotator and the drive mechanism, whereby movement of the contactor from the extended to the retracted position causes a further rotation of the rotator such that the drive mechanism may further act on the container for expelling a dose of medicament through the delivery member. - a housing (10, 114) having a proximal and a distal end, - a delivery member connected to the housing; - a medicament container operably arranged within the housing; - a drive mechanism (102, 108) capable of acting on the medicament container for priming and for expelling a dose of medicament; - an activator mechanism comprising: - a contactor operably arranged to the housing (10, 114) at a proximal end thereof, wherein the contactor is axially movable in relation to the housing between an extended position in which the delivery member is hidden and protected by the contactor and a retracted position in which the delivery member is exposed; - a rotator operably arranged inside the housing (10, 114) and operably connected to the contactor and to the drive mechanism (102, 108); and - a safety member operably arranged to the housing (10, 114) at a distal end thereof and operably connected to the rotator;