Abstract: An injection device for delivering a dose of medicament from a syringe comprises a housing with a forward body and rearward body, the forward and rearward bodies being axially moveably interconnected. A drive mechanism is arranged, in use, to deliver a dose from the syringe, the drive mechanism being activated by a trigger. The injection device further comprises an interlock having a locked position in which activation of the drive mechanism by the trigger is prevented and an unlocked position in which the drive mechanism may be activated. The interlock arrangement is moved to the unlocked position by relative axial movement of the forward and rearward body caused by the injection device being urged against an injection site. The injection device further comprises an interlock hold arrangement associated with a forward facing skin abutment surface of the injection device.