Abstract: An injection device is presented having an outer housing configured to receive a syringe, the syringe containing medicament, a movable stopper, and a needle. A plunger rod moves the stopper and a needle shield moves relative to the outer housing between a needle covering position and a needle exposing position, where the needle exposing position is axially rearward of the needle covering position. The needle shield is biased axially forwardly toward the needle covering position. A locking member is axially moveable in the outer housing from a first axial position to a second axial position in response to forward axial movement of the plunger rod. A locking sleeve is axially movable relative to the outer housing between a non-locking position and a locking position, the locking position being axially rearward of the non-locking position, in which axial movement of the locking sleeve is selectively limited by the locking member when in the second axial position.