PURPOSE: To prevent roughening surface on the casting surface even if facing agent is saved by pouring the specific temp. of molten metal into a mold manufactured with binder containing organic binder as main component, developing carbon film having the specific characteristic on interface and casting.

CONSTITUTION: The molten metal having 1200W1800°C is poured into the mold with the binder, and by developing the carbon film having the undermentioned characteristic on the interface between the mold and the casting, it is cast. (1) Raman spectrum of the carbon film has bends at 1330W1390cm-1 and 1550W1630cm-1 and relative intensity is 0.5W2.0. (2) Face interval in (002) face of carbon with X ray diffraction of the carbon film is 3.35W4.25. The relative intensity for two bands is the ratio (B/A) of 1330W1390cm-1 band height B from the base line to 1550W1630cm-1 band height A. The organic binder uses fran resin, phenol resin and is desirable to add pitch, tar, etc. By this method, the roughening surface of the casting surface without using heat resistant film on the mold surface, that is, the facing agent, can be prevented.