Provided is an antenna device having a reduced height and enhanced receiving sensitivity. The antenna device includes an antenna base and an antenna cover fixed to the antenna base. The antenna cover includes a resin cover body and a capacitive element integrally molded with the cover body and functioning as at least any one of a capacitance hat and an inductor. The antenna device 1 further includes a helical element electrically connected to the capacitive element and an antenna board electrically connected to the helical element and disposed on the antenna base.
