A wiring board includes an external connection terminal of a cylindrical shape, in which an electrode terminal of the electronic component to be mounted is fitted. In one configuration, a portion of the external connection terminal is electrically connected to a pad portion formed on an electronic component mounting surface side of the wiring board, and the external connection terminal is curvedly formed in such a shape that the outer periphery of the electrode terminal comes into close contact with the inner periphery of the middle portion of the external connection terminal when the electrode terminal is inserted into the external connection terminal.