Abstract: The invention provides a compact and light-weight antenna device for use in a mobile telephone requiring a wide frequency band. An antenna device 10 includes a first printed circuit board 11 and a ground plate 12 generally arranged in parallel, and a second printed circuit board 13 arranged vertically between the first printed circuit board 11 and the ground plate 12, and an antenna body 14 mounted on the second printed circuit board 13. A capacitive load conductor 15 is mounted on the first printed circuit board 11, and a surface electrode 16, a ground electrode 17 and a transmission line 18 are mounted on the second printed circuit board 13. The antenna body 14 is provided with terminals 19 and 21 connected to both ends of a conductor (not shown).