To provide a nail improving workability and preventing slanting during penetration by preventing easy loosening by a simple structure and reducing a penetration amount into a workpiece.

The nail 1 fixes a workpiece T by hitting a head 1A1 positioned in one end of a shaft part 1A and penetrating the workpiece T. In an interior of the shaft part 1A, a whole area in an axial direction from the head 1A1 to a tapered face 1B is penetrated and hollow, an interior of a tip part 1A2 positioned in the other end of the shaft part being a side pierced into the workpiece T is formed as the tapered face 1B with an inner diameter enlarged toward the tip, the tapered face 1B is divided by a plurality of slits 1C provided along a circumferential direction, and the tapered face 1B is enlarged as the nail advances into the workpiece T.