Abstract: A needle cover is moveable in the axial direction of a needle body is included. When a cap covering the needle body is detached from a hub, locking portions on a cap are locked at a first locking portion of the cover and the cover moves to the tip end side of the needle body with the cap, so the tip end side of the needle body is covered by the cover. Therefore, the external force in the bending direction is not directly applied to the needle body when or after the cap is detached. Since the needle cover can be moved to the tip end side of the needle body by locking the cap to the needle cover, no spring is needed to move the cover to the tip end side of the needle body, or form the cover into an extendable and retractable complicated shape.