A pen needle according to the invention comprises a needle hub (70) having a recess (80) for a pen injector (60) and vial (40). When the pen injector is loaded into the hub, the needle cannula (110) mounted in the hub pierces the septum (50) of the vial. A non-patient end (non-injection end) shield (10) positioned in the hub member engages the pen injector (60) and travels with the pen injector when the pen injector is removed, to shield the non-patient of the needle. The shield (10) is locked into place securing the person administering the injection from accidental injury from the non-patient end of the needle.
