Auto-injector for administering a dose of a liquid medicament comprising- a cylindrical chassis arranged to contain a pre-filled syringe with a syringe barrel, an injection needle and a stopper for sealing the syringe barrel,- a needle shroud slidably arranged within the chassis and adapted to rest on the skin of a patient receiving an injection,- a plunger adapted to translate the stopper to expel the dose of the medicament through the injection needle,- a coupling shroud slidably arranged within the chassis and releasably coupled to the plunger and- a drive means. Upon release, the drive means is capable of driving the coupling shroud from a first position in a proximal direction. The proximal translatory movement of the coupling shroud with respect to the chassis- translates the pre-filled syringe in the proximal direction to expose the injection needle,- depresses the plunger connected to the stopper into the syringe barrel and- advances the needle shroud to a safe position to surround the injection needle after the injection. The coupling shroud is arranged to be decoupled from the plunger at a second position.
