An antenna element includes a substrate, a first vertically polarized dipole antenna, a second vertically polarized dipole antenna, a reflector and a first feeding structure. The substrate has a ground plate. The first vertically polarized dipole antenna includes a first antenna branch and a second antenna branch that are disposed in the substrate at an interval. The second vertically polarized dipole antenna includes a third antenna branch and a fourth antenna branch that are disposed in the substrate at an interval. The reflector includes several reflection pillars that are arranged in the substrate at intervals along a parabola. The first feeding structure electrically connects each of the first antenna branch, the second antenna branch, the third antenna branch, and the fourth antenna branch to the ground plate.