an antenna holder for holding an antenna includes signal wiring and ground wiring being disposed on a single circuit board as either one of an external element and an internal element respectively with one end electrically coupled with a circuit on the single circuit board for serving as the external element in a spiral shape and the internal element inside of the external element at a predetermined distance . the antenna holder is provided with a spacer for keeping the predetermined distance between the external and the internal elements as well as an external tilt suppressor for suppressing a tilt of the external element from a direction being orthogonal to the circuit board .