An electronic device includes: a housing; a substrate that has a first surface and a second surface each mounted with a heat generating component and that is fixed in the housing; a first heat transfer component that extends along the first surface so as to contact the heat generating component mounted on the first surface; and a second heat transfer component that extends along the second surface so as to contact the heat generating component mounted on the second surface, and that is fastened to the first heat transfer component by a fastener such that the substrate is sandwiched between the second heat transfer component and the first heat transfer component.