Abstract: A zipper head is composed of a head, a pull tab connected with the head, and an elastic piece. The pull tab is provided with an insertion slot, a hooked portion and a cross beam. The elastic piece of a U-shaped construction has a first arm, a second arm, a curved portion connected with the first arm and the second arm, and an urging portion located between the first arm and the second arm. The elastic piece is joined with the pull tab such that the first arm of the elastic piece is retained in the insertion slot of the pull tab, and that the curved portion of the elastic piece is disposed on the cross beam of the pull tab, and further that the second arm of the elastic piece seals off an open end of the hooked portion of the pull tab, and still further that the urging portion of the elastic piece urges the cross beam of the pull tab.