An electronic device having a fifth-generation (5G) antenna according to an embodiment is provided. The electronic device includes a cover glass through which electromagnetic waves are transmitted, a metal frame having a metal rim formed on side surfaces of the electronic device, an antenna module configured to transmit or receive beamformed signals through a plurality of antenna elements, and a frame mold made of a dielectric and disposed between the metal frame and the antenna module, wherein a frame slot is formed in a lower portion of the metal frame so that the signals transmitted or received in the antenna module is radiated through the frame slot.