The present invention relates in one aspect to a housing for an injection device, comprising: —a body (30) to accommodate a drive mechanism (5) to operably engage with a piston (52) of a cartridge (50) filled with a liquid injectable medicament (53), —a cartridge holder (20) having a cartridge receiving space (25) to accommodate the cartridge (50), —wherein the cartridge holder (20) and the body (30) comprise an elongated shape and extend along an axial longitudinal direction (1, 2), —wherein the cartridge holder (20) has an insert section (21) at a proximal end (23), —wherein the body (30) has a receptacle (31) at a distal end (33) to receive the insert section (21) of the cartridge holder (20), —wherein the body (30) comprises a first latch element (34) on an inside (32) of a sidewall (32) of the receptacle (31), —wherein the cartridge holder (20) comprises a first through recess (24) in a sidewall (22) of the insert section (21) which through recess (24) is configured to receive the first latch element (34), wherein the through recess (24) comprises a narrowed neck receiving portion (24a) extending axially into a widened latch receiving portion (24b), wherein a first lateral width (w1) of the neck receiving portion (24a) is smaller than a second lateral width (w2) of the latch receiving portion (24b).