A wiring board includes: an insulating layer that includes a first surface over which an electronic component is mounted and a second surface opposite to the first surface; a conductive layer that is disposed on the second surface; a via that is provided inside a first through-hole that penetrates a portion between the first surface and the second surface of the insulating layer; an electrode that is disposed on the first surface and connected to the via; and a glass plate that is not contact with the conductive layer and is disposed on the first surface and includes a second through-hole through which the electrode is disposed.