To provide a small-sized high-frequency module where an antenna switch circuit, a low pass filter, a coupler circuit and high-frequency amplifier circuit are integrally moduled in a multilayer substrate by primarily redesigning the layout configuration of electrode patterns of a coupler circuit.

In the high-frequency module where the antenna switch circuit, the low pass filter circuit, the coupler circuit and high-frequency amplifier circuit are module integrated by using a circuit element comprised of the electrode patterns in a multilayer substrate formed by laminating a plurality of dielectric layers and by the circuit element mounted on the multilayer substrate, a main channel and subchannel of the coupler circuit are comprised of the electrode patterns in the multilayer substrate. The electrode patterns for the main channel and subchannel are disposed not only in different dielectric layers in the multilayer substrate but also in upper and lower laminating directions separately.