A communication device includes a ground element and an antenna element. The antenna element is disposed adjacent to an edge of the ground element. The antenna element includes a first metal element and a second metal element. The first metal element has a first end and a second end. The first end is coupled through a capacitive element to a communication module. The second end is coupled through a shorting element to the ground element. The second metal element has a third end and a fourth end. The third end is coupled to the communication module. The fourth end is open. The first metal element and the second metal element are adjacent to each other, but not connected to each other. The first metal element and the second metal element have projections on the edge of the ground element, wherein the projections do not overlap with each other.