The present disclosure relates to a medicament delivery device comprising:a housing configured to receive a cartridge containing a medicamentan injection needle having a proximal end and a distal endan injection needle holder to which the injection needle is fixed, the injection needle holder being moveable relative to the housing between a rest position and a use position andan injection needle cap detachably connected to the injection needle holder and enclosing the proximal end of the injection needle. The medicament delivery device is configured such that pushing the injection needle cap towards the cartridge causes the injection needle holder to move from the rest position in which the distal end of the injection needle is spaced from the cartridge towards the use position in which the distal end of the injection needle can engage the cartridge.