TO PREVENT A COATING AGENT APPLIED TO THE SURFACE OF A NEEDLE TUBE FROM BEING INFILTRATED INTO THE CLEARANCE BETWEEN THE NEEDLE TUBE AND A NEEDLE HUB. A DEVICE COMPRISES A NEEDLE TUBE (5) THAT HAS A NEEDLE TIP (5A) CAPABLE OF PUNCTURING A LIVING BODY AND THAT IS COATED WITH A COATING AGENT ON THE SURFACE OF A TIP-END PORTION ON THE SIDE OF THE NEEDLE TIP (5A) AND A NEEDLE HUB (6) ADAPTED TO HOLD THE NEEDLE TUBE (5) IN A STATE WHERE THE NEEDLE TIP (5A) OF THE NEEDLE TUBE (5) IS PROTRUDED. THE NEEDLE HUB (6) HAS A THROUGH-HOLE (21) THROUGH WHICH THE NEEDLE TUBE (5) IS INSERTED, AND A DISCHARGE HOLE (23) EXTENDING FROM THE THROUGH-HOLE (21) TO THE OUTER SURFACE OF THE NEEDLE HUB (6) AND ADAPTED TO DISCHARGE THE COATING AGENT INFILTRATED INTO THE THOUGH-HOLE (21) FIG. 3
