The present invention relates to a drug delivery device for administering a predefined dose of a medicament comprising of housing. The housing comprising of a body to accommodate a drive mechanism, a cartridge holder to accommodate a cartridge having a piston slidably disposed therein in an axial direction (z), and an interconnection between cartridge holder and body, said interconnection having at least one displaceable or resiliently deformable latch element to mate with a corresponding bearing, wherein the latch element is displaceable or deformable in a direction (z, w) extending substantially parallel to a circumferential side wall of the body or cartridge holder.
