Abstract: PROBLEMS A method for die-casting that fluidity of molten material is satisfactory and the molten material solidifies with suitable speed is realized. MEANS OF SOLVING THE PROBLEMS A die-casting die 12 comprises a cavity forming surface 9b. A part of the cavity forming surface 9b is coated with a surface treatment layer 24 having a thermal conductivity that increases in connection to an increase in an acted pressure. Satisfactory fluidity is kept at a cavity forming surface 8b coated with the surface treatment layer 24 until a filling of the molten material to the cavity 9 is completed. The molten material is cooled by the cavity forming surface 8b coated with the surface treatment layer 24 increasing the thermal conductivity after the filling of the molten material to the cavity 9 is completed.