PURPOSE: To decrease defects caused by a peeling member and to efficiently smooth a film by using such a resin film as a peeling member that has specified thickness and contains infusible silicone resin having a specified average particle size.

CONSTITUTION: A supporting substrate 2a on which a resin coating film 2b is formed is mounted by vacuum sucking on a heating surface plate 1 which can be travelled at a constant speed. A smoothing roller 6 for heating and pressing is disposed above the zone where the heating surface plate 1 is travelled. A supplying device 3 for the peeling member is also disposed so that the peeling member 4 is supplied through a guide roller 5 to separate the smoothing roller 6 and the heating surface plate 1. As for the peeling member 4, such a resin film is used that has 25-100μm thickness and contains 1-30wt.% infusible silicone resin particles having 0.1-5μm average particle size. The resin film is preferably a film showing little thermal deformation during pressing and heating, and a polyethylene terephthalate film or the like is used.