An antenna device is disclosed. The disclosed antenna device comprises: a printed circuit board; and a waveguide antenna formed on the printed circuit board, wherein the waveguide antenna comprises; a first conductive area formed under the printed circuit board; a second conductive area formed above the printed circuit board and disposed to face the first conductive area; and a plurality of vias, formed at predetermined intervals along edges of the first conductive area, for electrically connecting the first conductive area and the second conductive area.