To provide an antenna multicoupler maintaining at prescribed band precision, tuning frequency characteristics in a series tuning circuit switched by high-speed tuning.

On a printed circuit board, there are provided: a first impedance converter; a low-impedance transmission line for transmitting a high-frequency signal to an arbitrary position on the printed circuit board; a low-impedance branch/composite edge; a plurality of series tuning circuits tuned to a high frequency prescribed in each of a plurality of channels; a high-speed switching high-frequency tuning inductor that has a plurality of inductors and is tuned to mid and low frequencies; a plurality of radios allocated to each of the plurality of channels; and a second impedance converter. The low-impedance branch/composite edge is formed in an equilateral polygon, and the low-impedance transmission line is formed by a microstrip line provided on the rear of the printed circuit board.