To provide a nail capable of being surely positioned on a plate without being dropped from a plate material.

This nail includes a main body composed of a nail head, a barrel portion and a nail tip in a state of mounting the nail head and the nail tip at both ends of the barrel portion, and a positioning member, the barrel portion is provided with a guide portion, a maximum diameter of the guide portion is necessarily larger than a maximum diameter of the barrel portion and smaller than a maximum diameter of the nail head, the deformable positioning member is integrally molded on an outer peripheral face between a surface of the guide portion and the nail head in a state of covering the barrel portion, and when the main body is pounded to the plate material, the guide portion guides the main body, and a contact portion formed in a state of being penetrated through the plate material presses the positioning member, thus they are closely engaged with each other.