Abstract: An antenna structure includes a metal mechanism element, a ground element, a feeding radiation element, a connection radiation element, a shorting radiation element, a parasitic radiation element, and a dielectric substrate. The metal mechanism element has a slot. The feeding radiation element has a feeding point. The connection radiation element is coupled to the feeding radiation element. The connection radiation element is further coupled through the shorting radiation element to the ground element. The parasitic radiation element is coupled to the ground element. The parasitic radiation element is disposed between the feeding radiation element and the shorting radiation element. The dielectric substrate is adjacent to the slot of the metal mechanism element. The feeding radiation element, the connection radiation element, the shorting radiation element, and the parasitic radiation element are all disposed on the dielectric substrate.