The invention relates to an auto-injector (1) for administering a dose of a liquid medicament (M), comprising: - an elongate housing (2) arranged to contain a syringe (3), wherein the syringe (3) is slidably arranged with respect to the housing (2), - spring means (8) capable of, upon activation: - pushing the needle (4) from a covered position inside the housing (2) into an advanced position through the orifice and past the proximal end (P), - operating the syringe (3) to supply the dose of medicament (M), and - retracting the syringe (3) with the needle (4) into the covered position after delivering the medicament (M). - activating means (20). The activating means (20) comprises a trigger button (20) arranged at the distal end (D) of the auto-injector (1), wherein the trigger button (20) is locked, thereby preventing actuation when the interlock sleeve (45) is in its proximal position in an as delivered state and wherein translation of the interlock sleeve (45) unlocks the trigger button (20) so as to allow actuation.
