A heat-dissipating film comprising a heat-conductive layer obtained by burning a mixture layer of flaky carbon and a binder resin to carbonize or burn off the binder resin, and plastic films covering the heat-conductive layer, the heat-conductive layer having a density of 1.9 g/cm3 or more and thermal conductivity of 450 W/mK or more, is produced by (1) sandwiching a mixture layer of flaky carbon and a binder resin with a pair of first plastic films to form a laminated film; (2) heat-pressing the laminated film to densify the mixture layer; (3) burning the mixture layer to carbonize the binder resin in the mixture layer; (4) pressing the resultant burnt layer to form the heat-conductive layer; and (5) sealing the heat-conductive layer with second plastic films.