Medicament Delivery Device

A medicament delivery device, comprising:

• a housing, comprising a proximal housing part and a distal housing part movable relative each other;
• a drive force mechanism accommodated in the distal housing part and comprising a counter-connecting device;
• a container filled with medicament within the proximal housing part;
• a holding member operably connected to the drive force mechanism for holding the drive force mechanism in a loaded state, wherein the holding member comprises a connecting device and an engagement device;
• and
• an actuation member arranged to interact with the holding member for releasing the drive force mechanism from its loaded state, wherein the actuation member comprises a counter-engagement device;
• wherein the holding member is arranged to be moved by the proximal housing part when the proximal and distal housing parts are moved toward each other from a disengaged position, in which the holding member is disengaged from the actuation member, to an engaged position, in which the holding member is engaged to the actuation member, such that the engagement device and the counter-engagement device interact for engaging the connecting device to the counter-connecting device.