An antenna apparatus and an electronic device having the same is provided. The electronic device includes an antenna radiator formed in a loop shape having at least one opening end part opened by a slit, at least a portion of the at least one opening end part is fed, at least one electronic component of metal material electrically connected with the antenna radiator, and at least one metal member arranged around the antenna radiator, where the at least one opening end part is formed in a reverse direction from the direction of the metal member.