An injection device 10 (such as an auto-injector) having an outer housing 24 configured to receive a syringe 12 comprises a needle shield 28 which is axially moveable relative to the outer housing between a needle covering position and a needle exposing position and a biasing means 40 to bias the needle shield axially forwardly toward the needle covering position. A locking sleeve 30, axially movable relative to the outer housing between a forward non locking position and a rearward locking position, selectively limits axial movement of the needle shield such that in a first configuration, the needle shield is axially slideable within the locking sleeve and in a subsequent configuration, the needle shield is prevented from moving axially rearwardly by interference with the locking sleeve, maintaining the needle shield in the needle covering position.
