To suppress occurrence of an unnecessary high harmonic component at the time of transmission and to secure a sufficient transmission characteristic in a module provided with a transmission/reception system of a multi-band system of not less than a triple band system.

The module is provided with a branching circuit in which a surface and/or an inner part of a multilayer wiring board are/is connected to an antenna and at least three or above transmission/reception systems different in pass bands are divided into the respective transmission/reception systems and a switch circuit which is connected to the branching circuit and changes over the transmission/reception systems to a transmission system and a reception system. The switch circuit is formed by mounting a PIN diode and a generated amount of harmonics when the PIN diode is not conducted is set to be not more than -5dBm.