To provide a band having a metal arranged on the center of its upper surface.

A metal piece 2 is arranged at the metal piece holding part of an elastic piece 1 so that the guiding wall of the metal piece may be in contact with a metal piece holding wall 15 and so that metal piece connection pin holding holes A21 may be coaxial with connection pin holding holes A11. A link 3 is arranged between metal piece inner walls 26 facing each other so that the link connection pin holding hole A31 of the link 3 may be coaxial with the connection pin holding holes A11. A connection pin 4 is made to pass through a pass-through pin hole A13, one of the connection pin holding holes A11, one of the metal piece connection pin holding holes A21, the link connection pin holding hole A31, the other metal piece connection pin holding holes A21 facing the one of them and the other connection pin holding hole A11 facing the one of them in order.