To provide a method for melting a metal block capable of improving heat transmission efficiency and reducing a specific consumption rate of fuel compared to a prior art, and also capable of significantly reducing the emission amount of a carbon dioxide, and to provide the metal block used for the method.

The method for melting the metal block to obtain a molten metal includes steps for: laminating and filling metal blocks in a melting furnace to form a metal filled body; heating the lower part of the metal block filled body to successively melt the metal block from the underside; and using the thermal energy generated by the melting of the metal block to preliminarily heat the metal block filled body. The filling rate of the metal block is from 60 to 70% of the maximum volume that can be filled with the metal block in the melting furnace.