A multilayer wiring board includes a first metal foil wiring layer that has at least two or more layers of metal foil wiring lines and is arranged on a mounting surface side for mounting a surface mount type component, a wire wiring layer that is arranged on an opposite side of the mounting surface, and in which an insulation coating wire is wired, and a first interlayer conduction hole that has a conduction part which electrically connects the metal foil wiring line positioned on a surface of the first metal foil wiring layer to at least one of the metal foil wiring line in an inner layer of the first metal foil wiring layer and the insulation coating wire of the wire wiring layer. A hole diameter of the first interlayer conduction hole varies in a board thickness direction of the multilayer wiring board.