A communication device including a ground element and an antenna element is provided. The antenna element includes a metal element. The metal element has a plurality of bends and substantially forms a loop structure with a gap. The gap is between a first open end and a second open end of the metal element. The metal element extends along an edge of the ground element and does not overlap with the ground element. The antenna element has a feeding point. A first portion of the metal element is between the feeding point and the first open end, and a second portion of the metal element is between the feeding point and the second open end. The feeding point, the first open end, and the second open end are all facing or adjacent to the edge of the ground element.