A heat receiving sheet for receiving heat from electronic components comprises a heat transfer part and a heat insulation part. A heat-generating component which is an electronic component having a high heat generation rate contacts with the heat transfer part of the heat receiving sheet, while a low-temperature component which is an electronic component having a low heat generation rate and having thermal weakness contacts with the heat insulation part of the heat receiving sheet. The heat generated in the heat-generating component is transmitted to the heat receiving sheet (heat transfer part) in a contacted state, so that the heat-generating component is cooled. The low-temperature component contacts with the heat insulation part, hence does not receive via the heat receiving sheet the heat generated in the heat-generating component.