The characteristics of a shield wall that prevents the mutual interference of the noise between components are improved by lowering the resistance of the shield wall. A high-frequency module 1a includes a wiring board 2, a plurality of components 3a to 3e mounted on an upper surface 2a of the wiring board 2, a sealing resin layer 4 stacked on the upper surface 2a of the wiring board 2 to seal the components 3a to 3e, and a shield wall 5 disposed between the adjacent components in the sealing resin layer 4. A part of the shield wall 5 is constituted of metal pins 5a standing on the upper surface 2a of the wiring board 2.