A high-frequency module has a multilayer board formed by laminating a plurality of sheets made of a thermoplastic resin material and subjecting the laminated sheets to thermocompression bonding, and an IC chip placed in a cavity provided in the multilayer board. A gap is provided between a side of the IC chip and an inner wall of the cavity. The multilayer board includes a via-hole conductor provided near the inner wall of the cavity for preventing the resin sheets from being softened and flowing into the cavity upon thermocompression bonding.