A supporting plate includes a metal plate and is utilized to support a heat sink module in an electronic device. The heat sink module has a thermal pad, and the electronic device has a first heat generating element and a second heat generating element. In addition, the heat sink module is contacted to the first heat generating element for conducting heat generated by the first heat generating element to the thermal pad. Moreover, the metal plate has a first concave portion and a second concave portion. The first concave portion is contacted to the thermal pad, and the second concave portion is contacted to the second heat generating element for conducting heat generated by the second heat generating element to the heat sink.