A module 1a includes an electronic component 3a, and also includes a wiring substrate 2 on one principal surface of which the electronic component 3a is mounted and in which a radiator 4 for dissipating heat generated from the electronic component 3 is provided. The radiator 4 includes a heat dissipation section 4a that is provided so that a part thereof is exposed to a side surface of the wiring substrate 2. In this case, because the heat dissipation section 4a is provided so that a part thereof is exposed to the side surface of the wiring substrate 2, the heat from the electronic component 3a can be dissipated through the side surface of the wiring substrate 2.